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Finding the Fourth Proportional to 10,140.20, 15,204.90 and 4,290.20

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Solution

The fourth proportional to 10,140.20, 15,204.90 and 4,290.20 is: 6,433.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,140.20 : 15,204.90 = 4,290.20 : x
  2. Step 2: Convert to fraction form
    10,140.20/15,204.90 = 4,290.20/x
  3. Step 3: Cross multiply
    10,140.20x = 15,204.90 × 4,290.20
  4. Step 4: Simplify right side
    10,140.20x = 65,232,061.98
  5. Step 5: Solve for x
    x = 65,232,061.98/10,140.20
  6. Step 6: Final answer
    x = 6,433.02

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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.