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Finding the Fourth Proportional to 15,108.74, 20,851.47 and 9,141.88

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Solution

The fourth proportional to 15,108.74, 20,851.47 and 9,141.88 is: 12,616.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,108.74 : 20,851.47 = 9,141.88 : x
  2. Step 2: Convert to fraction form
    15,108.74/20,851.47 = 9,141.88/x
  3. Step 3: Cross multiply
    15,108.74x = 20,851.47 × 9,141.88
  4. Step 4: Simplify right side
    15,108.74x = 190,621,636.56
  5. Step 5: Solve for x
    x = 190,621,636.56/15,108.74
  6. Step 6: Final answer
    x = 12,616.65

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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.