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Finding the Fourth Proportional to 15,884.92, 21,921.36 and 8,714.85

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Solution

The fourth proportional to 15,884.92, 21,921.36 and 8,714.85 is: 12,026.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,884.92 : 21,921.36 = 8,714.85 : x
  2. Step 2: Convert to fraction form
    15,884.92/21,921.36 = 8,714.85/x
  3. Step 3: Cross multiply
    15,884.92x = 21,921.36 × 8,714.85
  4. Step 4: Simplify right side
    15,884.92x = 191,041,364.20
  5. Step 5: Solve for x
    x = 191,041,364.20/15,884.92
  6. Step 6: Final answer
    x = 12,026.59

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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.