Home / 15,301.20-21,115.08-8,587.20

Finding the Fourth Proportional to 15,301.20, 21,115.08 and 8,587.20

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Solution

The fourth proportional to 15,301.20, 21,115.08 and 8,587.20 is: 11,850.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,301.20 : 21,115.08 = 8,587.20 : x
  2. Step 2: Convert to fraction form
    15,301.20/21,115.08 = 8,587.20/x
  3. Step 3: Cross multiply
    15,301.20x = 21,115.08 × 8,587.20
  4. Step 4: Simplify right side
    15,301.20x = 181,319,414.98
  5. Step 5: Solve for x
    x = 181,319,414.98/15,301.20
  6. Step 6: Final answer
    x = 11,850.01

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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.