Home / 15,730.97-21,709.80-8,657.85

Finding the Fourth Proportional to 15,730.97, 21,709.80 and 8,657.85

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Solution

The fourth proportional to 15,730.97, 21,709.80 and 8,657.85 is: 11,948.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.97 : 21,709.80 = 8,657.85 : x
  2. Step 2: Convert to fraction form
    15,730.97/21,709.80 = 8,657.85/x
  3. Step 3: Cross multiply
    15,730.97x = 21,709.80 × 8,657.85
  4. Step 4: Simplify right side
    15,730.97x = 187,960,191.93
  5. Step 5: Solve for x
    x = 187,960,191.93/15,730.97
  6. Step 6: Final answer
    x = 11,948.42

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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.