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Finding the Fourth Proportional to 15,034.56, 20,747.58 and 8,987.58

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Solution

The fourth proportional to 15,034.56, 20,747.58 and 8,987.58 is: 12,402.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,034.56 : 20,747.58 = 8,987.58 : x
  2. Step 2: Convert to fraction form
    15,034.56/20,747.58 = 8,987.58/x
  3. Step 3: Cross multiply
    15,034.56x = 20,747.58 × 8,987.58
  4. Step 4: Simplify right side
    15,034.56x = 186,470,535.06
  5. Step 5: Solve for x
    x = 186,470,535.06/15,034.56
  6. Step 6: Final answer
    x = 12,402.79

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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.