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Finding the Fourth Proportional to 15,894.12, 21,932.86 and 9,925.44

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Solution

The fourth proportional to 15,894.12, 21,932.86 and 9,925.44 is: 13,696.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.12 : 21,932.86 = 9,925.44 : x
  2. Step 2: Convert to fraction form
    15,894.12/21,932.86 = 9,925.44/x
  3. Step 3: Cross multiply
    15,894.12x = 21,932.86 × 9,925.44
  4. Step 4: Simplify right side
    15,894.12x = 217,693,285.96
  5. Step 5: Solve for x
    x = 217,693,285.96/15,894.12
  6. Step 6: Final answer
    x = 13,696.47

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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.