Home / 5,487.90-8,231.85-5,219.10

Finding the Fourth Proportional to 5,487.90, 8,231.85 and 5,219.10

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Solution

The fourth proportional to 5,487.90, 8,231.85 and 5,219.10 is: 7,828.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.90 : 8,231.85 = 5,219.10 : x
  2. Step 2: Convert to fraction form
    5,487.90/8,231.85 = 5,219.10/x
  3. Step 3: Cross multiply
    5,487.90x = 8,231.85 × 5,219.10
  4. Step 4: Simplify right side
    5,487.90x = 42,962,848.34
  5. Step 5: Solve for x
    x = 42,962,848.34/5,487.90
  6. Step 6: Final answer
    x = 7,828.65

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.