Home / 15,728.73-21,705.65-8,655.15

Finding the Fourth Proportional to 15,728.73, 21,705.65 and 8,655.15

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Solution

The fourth proportional to 15,728.73, 21,705.65 and 8,655.15 is: 11,944.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728.73 : 21,705.65 = 8,655.15 : x
  2. Step 2: Convert to fraction form
    15,728.73/21,705.65 = 8,655.15/x
  3. Step 3: Cross multiply
    15,728.73x = 21,705.65 × 8,655.15
  4. Step 4: Simplify right side
    15,728.73x = 187,865,727.17
  5. Step 5: Solve for x
    x = 187,865,727.17/15,728.73
  6. Step 6: Final answer
    x = 11,944.12

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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.