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Finding the Fourth Proportional to 15,086.16, 20,820.15 and 8,373.20

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Solution

The fourth proportional to 15,086.16, 20,820.15 and 8,373.20 is: 11,555.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,086.16 : 20,820.15 = 8,373.20 : x
  2. Step 2: Convert to fraction form
    15,086.16/20,820.15 = 8,373.20/x
  3. Step 3: Cross multiply
    15,086.16x = 20,820.15 × 8,373.20
  4. Step 4: Simplify right side
    15,086.16x = 174,331,175.88
  5. Step 5: Solve for x
    x = 174,331,175.88/15,086.16
  6. Step 6: Final answer
    x = 11,555.70

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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.