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Finding the Fourth Proportional to 20,039.52, 30,068.64 and 8,945.10

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Solution

The fourth proportional to 20,039.52, 30,068.64 and 8,945.10 is: 13,421.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,039.52 : 30,068.64 = 8,945.10 : x
  2. Step 2: Convert to fraction form
    20,039.52/30,068.64 = 8,945.10/x
  3. Step 3: Cross multiply
    20,039.52x = 30,068.64 × 8,945.10
  4. Step 4: Simplify right side
    20,039.52x = 268,966,991.66
  5. Step 5: Solve for x
    x = 268,966,991.66/20,039.52
  6. Step 6: Final answer
    x = 13,421.83

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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.