Home / 15,660.64-21,612.12-8,587.54

Finding the Fourth Proportional to 15,660.64, 21,612.12 and 8,587.54

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Solution

The fourth proportional to 15,660.64, 21,612.12 and 8,587.54 is: 11,851.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,660.64 : 21,612.12 = 8,587.54 : x
  2. Step 2: Convert to fraction form
    15,660.64/21,612.12 = 8,587.54/x
  3. Step 3: Cross multiply
    15,660.64x = 21,612.12 × 8,587.54
  4. Step 4: Simplify right side
    15,660.64x = 185,594,944.98
  5. Step 5: Solve for x
    x = 185,594,944.98/15,660.64
  6. Step 6: Final answer
    x = 11,851.04

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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.