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Finding the Fourth Proportional to 36,354.80, 54,535.80 and 12,658.70

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Solution

The fourth proportional to 36,354.80, 54,535.80 and 12,658.70 is: 18,989.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,354.80 : 54,535.80 = 12,658.70 : x
  2. Step 2: Convert to fraction form
    36,354.80/54,535.80 = 12,658.70/x
  3. Step 3: Cross multiply
    36,354.80x = 54,535.80 × 12,658.70
  4. Step 4: Simplify right side
    36,354.80x = 690,352,331.46
  5. Step 5: Solve for x
    x = 690,352,331.46/36,354.80
  6. Step 6: Final answer
    x = 18,989.30

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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.