Home / 15,731.08-21,709.15-8,657.55

Finding the Fourth Proportional to 15,731.08, 21,709.15 and 8,657.55

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Solution

The fourth proportional to 15,731.08, 21,709.15 and 8,657.55 is: 11,947.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.08 : 21,709.15 = 8,657.55 : x
  2. Step 2: Convert to fraction form
    15,731.08/21,709.15 = 8,657.55/x
  3. Step 3: Cross multiply
    15,731.08x = 21,709.15 × 8,657.55
  4. Step 4: Simplify right side
    15,731.08x = 187,948,029.94
  5. Step 5: Solve for x
    x = 187,948,029.94/15,731.08
  6. Step 6: Final answer
    x = 11,947.56

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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.