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Finding the Fourth Proportional to 15,658.62, 21,603.36 and 8,939.40

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Solution

The fourth proportional to 15,658.62, 21,603.36 and 8,939.40 is: 12,333.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,658.62 : 21,603.36 = 8,939.40 : x
  2. Step 2: Convert to fraction form
    15,658.62/21,603.36 = 8,939.40/x
  3. Step 3: Cross multiply
    15,658.62x = 21,603.36 × 8,939.40
  4. Step 4: Simplify right side
    15,658.62x = 193,121,076.38
  5. Step 5: Solve for x
    x = 193,121,076.38/15,658.62
  6. Step 6: Final answer
    x = 12,333.21

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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.