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Finding the Fourth Proportional to 14,665.78, 20,229.81 and 8,693.45

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Solution

The fourth proportional to 14,665.78, 20,229.81 and 8,693.45 is: 11,991.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,665.78 : 20,229.81 = 8,693.45 : x
  2. Step 2: Convert to fraction form
    14,665.78/20,229.81 = 8,693.45/x
  3. Step 3: Cross multiply
    14,665.78x = 20,229.81 × 8,693.45
  4. Step 4: Simplify right side
    14,665.78x = 175,866,841.74
  5. Step 5: Solve for x
    x = 175,866,841.74/14,665.78
  6. Step 6: Final answer
    x = 11,991.65

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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.