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Finding the Fourth Proportional to 15,886.44, 21,925.91 and 8,815.14

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Solution

The fourth proportional to 15,886.44, 21,925.91 and 8,815.14 is: 12,166.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.44 : 21,925.91 = 8,815.14 : x
  2. Step 2: Convert to fraction form
    15,886.44/21,925.91 = 8,815.14/x
  3. Step 3: Cross multiply
    15,886.44x = 21,925.91 × 8,815.14
  4. Step 4: Simplify right side
    15,886.44x = 193,279,922.20
  5. Step 5: Solve for x
    x = 193,279,922.20/15,886.44
  6. Step 6: Final answer
    x = 12,166.35

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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.