Home / 15,715.55-21,686.56-8,641.98

Finding the Fourth Proportional to 15,715.55, 21,686.56 and 8,641.98

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Solution

The fourth proportional to 15,715.55, 21,686.56 and 8,641.98 is: 11,925.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.55 : 21,686.56 = 8,641.98 : x
  2. Step 2: Convert to fraction form
    15,715.55/21,686.56 = 8,641.98/x
  3. Step 3: Cross multiply
    15,715.55x = 21,686.56 × 8,641.98
  4. Step 4: Simplify right side
    15,715.55x = 187,414,796.18
  5. Step 5: Solve for x
    x = 187,414,796.18/15,715.55
  6. Step 6: Final answer
    x = 11,925.43

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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.