Home / 21,705.90-29,951.52-12,751.38

Finding the Fourth Proportional to 21,705.90, 29,951.52 and 12,751.38

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Solution

The fourth proportional to 21,705.90, 29,951.52 and 12,751.38 is: 17,595.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.90 : 29,951.52 = 12,751.38 : x
  2. Step 2: Convert to fraction form
    21,705.90/29,951.52 = 12,751.38/x
  3. Step 3: Cross multiply
    21,705.90x = 29,951.52 × 12,751.38
  4. Step 4: Simplify right side
    21,705.90x = 381,923,213.10
  5. Step 5: Solve for x
    x = 381,923,213.10/21,705.90
  6. Step 6: Final answer
    x = 17,595.36

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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.