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Finding the Fourth Proportional to 13,543.80, 20,276.10 and 9,655.80

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Solution

The fourth proportional to 13,543.80, 20,276.10 and 9,655.80 is: 14,455.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,543.80 : 20,276.10 = 9,655.80 : x
  2. Step 2: Convert to fraction form
    13,543.80/20,276.10 = 9,655.80/x
  3. Step 3: Cross multiply
    13,543.80x = 20,276.10 × 9,655.80
  4. Step 4: Simplify right side
    13,543.80x = 195,781,966.38
  5. Step 5: Solve for x
    x = 195,781,966.38/13,543.80
  6. Step 6: Final answer
    x = 14,455.47

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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.