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Finding the Fourth Proportional to 15,101.44, 20,839.68 and 8,386.88

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Solution

The fourth proportional to 15,101.44, 20,839.68 and 8,386.88 is: 11,573.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.44 : 20,839.68 = 8,386.88 : x
  2. Step 2: Convert to fraction form
    15,101.44/20,839.68 = 8,386.88/x
  3. Step 3: Cross multiply
    15,101.44x = 20,839.68 × 8,386.88
  4. Step 4: Simplify right side
    15,101.44x = 174,779,791.20
  5. Step 5: Solve for x
    x = 174,779,791.20/15,101.44
  6. Step 6: Final answer
    x = 11,573.72

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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.