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Finding the Fourth Proportional to 15,125.08, 20,873.56 and 8,412.20

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Solution

The fourth proportional to 15,125.08, 20,873.56 and 8,412.20 is: 11,609.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,125.08 : 20,873.56 = 8,412.20 : x
  2. Step 2: Convert to fraction form
    15,125.08/20,873.56 = 8,412.20/x
  3. Step 3: Cross multiply
    15,125.08x = 20,873.56 × 8,412.20
  4. Step 4: Simplify right side
    15,125.08x = 175,592,561.43
  5. Step 5: Solve for x
    x = 175,592,561.43/15,125.08
  6. Step 6: Final answer
    x = 11,609.36

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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.