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Finding the Fourth Proportional to 14,969.52, 20,666.82 and 13,308.90

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Solution

The fourth proportional to 14,969.52, 20,666.82 and 13,308.90 is: 18,374.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,969.52 : 20,666.82 = 13,308.90 : x
  2. Step 2: Convert to fraction form
    14,969.52/20,666.82 = 13,308.90/x
  3. Step 3: Cross multiply
    14,969.52x = 20,666.82 × 13,308.90
  4. Step 4: Simplify right side
    14,969.52x = 275,052,640.70
  5. Step 5: Solve for x
    x = 275,052,640.70/14,969.52
  6. Step 6: Final answer
    x = 18,374.18

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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.