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Finding the Fourth Proportional to 10,003.20, 15,010.20 and 4,160.40

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Solution

The fourth proportional to 10,003.20, 15,010.20 and 4,160.40 is: 6,242.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,003.20 : 15,010.20 = 4,160.40 : x
  2. Step 2: Convert to fraction form
    10,003.20/15,010.20 = 4,160.40/x
  3. Step 3: Cross multiply
    10,003.20x = 15,010.20 × 4,160.40
  4. Step 4: Simplify right side
    10,003.20x = 62,448,436.08
  5. Step 5: Solve for x
    x = 62,448,436.08/10,003.20
  6. Step 6: Final answer
    x = 6,242.85

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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.