Home / 6,438.38-8,885.12-3,605.85

Finding the Fourth Proportional to 6,438.38, 8,885.12 and 3,605.85

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Solution

The fourth proportional to 6,438.38, 8,885.12 and 3,605.85 is: 4,976.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,438.38 : 8,885.12 = 3,605.85 : x
  2. Step 2: Convert to fraction form
    6,438.38/8,885.12 = 3,605.85/x
  3. Step 3: Cross multiply
    6,438.38x = 8,885.12 × 3,605.85
  4. Step 4: Simplify right side
    6,438.38x = 32,038,391.92
  5. Step 5: Solve for x
    x = 32,038,391.92/6,438.38
  6. Step 6: Final answer
    x = 4,976.16

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Find fourth proportional to 3,219.19, 4,442.56 and 1,802.93
Half scale
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Double scale
Find fourth proportional to 6,439.38, 8,886.50 and 3,606.85
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.