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Finding the Fourth Proportional to 10,008.10, 15,008.10 and 3,430.90

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Solution

The fourth proportional to 10,008.10, 15,008.10 and 3,430.90 is: 5,144.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,008.10 : 15,008.10 = 3,430.90 : x
  2. Step 2: Convert to fraction form
    10,008.10/15,008.10 = 3,430.90/x
  3. Step 3: Cross multiply
    10,008.10x = 15,008.10 × 3,430.90
  4. Step 4: Simplify right side
    10,008.10x = 51,491,290.29
  5. Step 5: Solve for x
    x = 51,491,290.29/10,008.10
  6. Step 6: Final answer
    x = 5,144.96

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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.