Home / 15,728.16-21,705.32-8,654.58

Finding the Fourth Proportional to 15,728.16, 21,705.32 and 8,654.58

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Solution

The fourth proportional to 15,728.16, 21,705.32 and 8,654.58 is: 11,943.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,728.16 : 21,705.32 = 8,654.58 : x
  2. Step 2: Convert to fraction form
    15,728.16/21,705.32 = 8,654.58/x
  3. Step 3: Cross multiply
    15,728.16x = 21,705.32 × 8,654.58
  4. Step 4: Simplify right side
    15,728.16x = 187,850,385.09
  5. Step 5: Solve for x
    x = 187,850,385.09/15,728.16
  6. Step 6: Final answer
    x = 11,943.57

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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.