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Finding the Fourth Proportional to 15,126.20, 20,873.13 and 8,411.30

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Solution

The fourth proportional to 15,126.20, 20,873.13 and 8,411.30 is: 11,607.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.20 : 20,873.13 = 8,411.30 : x
  2. Step 2: Convert to fraction form
    15,126.20/20,873.13 = 8,411.30/x
  3. Step 3: Cross multiply
    15,126.20x = 20,873.13 × 8,411.30
  4. Step 4: Simplify right side
    15,126.20x = 175,570,158.37
  5. Step 5: Solve for x
    x = 175,570,158.37/15,126.20
  6. Step 6: Final answer
    x = 11,607.02

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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.