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Finding the Fourth Proportional to 19,638.80, 29,425.80 and 18,472.40

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Solution

The fourth proportional to 19,638.80, 29,425.80 and 18,472.40 is: 27,678.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,638.80 : 29,425.80 = 18,472.40 : x
  2. Step 2: Convert to fraction form
    19,638.80/29,425.80 = 18,472.40/x
  3. Step 3: Cross multiply
    19,638.80x = 29,425.80 × 18,472.40
  4. Step 4: Simplify right side
    19,638.80x = 543,565,147.92
  5. Step 5: Solve for x
    x = 543,565,147.92/19,638.80
  6. Step 6: Final answer
    x = 27,678.12

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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.