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Finding the Fourth Proportional to 14,909.87, 20,576.63 and 9,865.40

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Solution

The fourth proportional to 14,909.87, 20,576.63 and 9,865.40 is: 13,614.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,909.87 : 20,576.63 = 9,865.40 : x
  2. Step 2: Convert to fraction form
    14,909.87/20,576.63 = 9,865.40/x
  3. Step 3: Cross multiply
    14,909.87x = 20,576.63 × 9,865.40
  4. Step 4: Simplify right side
    14,909.87x = 202,996,607.38
  5. Step 5: Solve for x
    x = 202,996,607.38/14,909.87
  6. Step 6: Final answer
    x = 13,614.91

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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.