Home / 21,702.90-29,951.49-12,143.69

Finding the Fourth Proportional to 21,702.90, 29,951.49 and 12,143.69

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Solution

The fourth proportional to 21,702.90, 29,951.49 and 12,143.69 is: 16,759.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,702.90 : 29,951.49 = 12,143.69 : x
  2. Step 2: Convert to fraction form
    21,702.90/29,951.49 = 12,143.69/x
  3. Step 3: Cross multiply
    21,702.90x = 29,951.49 × 12,143.69
  4. Step 4: Simplify right side
    21,702.90x = 363,721,717.87
  5. Step 5: Solve for x
    x = 363,721,717.87/21,702.90
  6. Step 6: Final answer
    x = 16,759.13

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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.