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Finding the Fourth Proportional to 15,170.90, 20,938.37 and 11,203.47

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Solution

The fourth proportional to 15,170.90, 20,938.37 and 11,203.47 is: 15,462.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,170.90 : 20,938.37 = 11,203.47 : x
  2. Step 2: Convert to fraction form
    15,170.90/20,938.37 = 11,203.47/x
  3. Step 3: Cross multiply
    15,170.90x = 20,938.37 × 11,203.47
  4. Step 4: Simplify right side
    15,170.90x = 234,582,344.13
  5. Step 5: Solve for x
    x = 234,582,344.13/15,170.90
  6. Step 6: Final answer
    x = 15,462.66

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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.