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Finding the Fourth Proportional to 15,143.88, 20,892.75 and 11,174.46

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Solution

The fourth proportional to 15,143.88, 20,892.75 and 11,174.46 is: 15,416.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.88 : 20,892.75 = 11,174.46 : x
  2. Step 2: Convert to fraction form
    15,143.88/20,892.75 = 11,174.46/x
  3. Step 3: Cross multiply
    15,143.88x = 20,892.75 × 11,174.46
  4. Step 4: Simplify right side
    15,143.88x = 233,465,199.17
  5. Step 5: Solve for x
    x = 233,465,199.17/15,143.88
  6. Step 6: Final answer
    x = 15,416.47

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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.