Home / 15,731.34-21,709.26-8,657.64

Finding the Fourth Proportional to 15,731.34, 21,709.26 and 8,657.64

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Solution

The fourth proportional to 15,731.34, 21,709.26 and 8,657.64 is: 11,947.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.34 : 21,709.26 = 8,657.64 : x
  2. Step 2: Convert to fraction form
    15,731.34/21,709.26 = 8,657.64/x
  3. Step 3: Cross multiply
    15,731.34x = 21,709.26 × 8,657.64
  4. Step 4: Simplify right side
    15,731.34x = 187,950,957.75
  5. Step 5: Solve for x
    x = 187,950,957.75/15,731.34
  6. Step 6: Final answer
    x = 11,947.55

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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.