Home / 15,406.20-21,258.18-8,691.30

Finding the Fourth Proportional to 15,406.20, 21,258.18 and 8,691.30

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Solution

The fourth proportional to 15,406.20, 21,258.18 and 8,691.30 is: 11,992.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,406.20 : 21,258.18 = 8,691.30 : x
  2. Step 2: Convert to fraction form
    15,406.20/21,258.18 = 8,691.30/x
  3. Step 3: Cross multiply
    15,406.20x = 21,258.18 × 8,691.30
  4. Step 4: Simplify right side
    15,406.20x = 184,761,219.83
  5. Step 5: Solve for x
    x = 184,761,219.83/15,406.20
  6. Step 6: Final answer
    x = 11,992.65

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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.