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Finding the Fourth Proportional to 14,685.31, 20,264.20 and 8,398.09

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Solution

The fourth proportional to 14,685.31, 20,264.20 and 8,398.09 is: 11,588.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,685.31 : 20,264.20 = 8,398.09 : x
  2. Step 2: Convert to fraction form
    14,685.31/20,264.20 = 8,398.09/x
  3. Step 3: Cross multiply
    14,685.31x = 20,264.20 × 8,398.09
  4. Step 4: Simplify right side
    14,685.31x = 170,180,575.38
  5. Step 5: Solve for x
    x = 170,180,575.38/14,685.31
  6. Step 6: Final answer
    x = 11,588.49

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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.