Home / 5,312.40-7,328.12-3,187.38

Finding the Fourth Proportional to 5,312.40, 7,328.12 and 3,187.38

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Solution

The fourth proportional to 5,312.40, 7,328.12 and 3,187.38 is: 4,396.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,312.40 : 7,328.12 = 3,187.38 : x
  2. Step 2: Convert to fraction form
    5,312.40/7,328.12 = 3,187.38/x
  3. Step 3: Cross multiply
    5,312.40x = 7,328.12 × 3,187.38
  4. Step 4: Simplify right side
    5,312.40x = 23,357,503.13
  5. Step 5: Solve for x
    x = 23,357,503.13/5,312.40
  6. Step 6: Final answer
    x = 4,396.79

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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.