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Finding the Fourth Proportional to 15,144.65, 20,897.17 and 8,430.11

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Solution

The fourth proportional to 15,144.65, 20,897.17 and 8,430.11 is: 11,632.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,144.65 : 20,897.17 = 8,430.11 : x
  2. Step 2: Convert to fraction form
    15,144.65/20,897.17 = 8,430.11/x
  3. Step 3: Cross multiply
    15,144.65x = 20,897.17 × 8,430.11
  4. Step 4: Simplify right side
    15,144.65x = 176,165,441.79
  5. Step 5: Solve for x
    x = 176,165,441.79/15,144.65
  6. Step 6: Final answer
    x = 11,632.19

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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.