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Finding the Fourth Proportional to 29,279.16, 40,405.23 and 15,850.40

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Solution

The fourth proportional to 29,279.16, 40,405.23 and 15,850.40 is: 21,873.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,279.16 : 40,405.23 = 15,850.40 : x
  2. Step 2: Convert to fraction form
    29,279.16/40,405.23 = 15,850.40/x
  3. Step 3: Cross multiply
    29,279.16x = 40,405.23 × 15,850.40
  4. Step 4: Simplify right side
    29,279.16x = 640,438,978.34
  5. Step 5: Solve for x
    x = 640,438,978.34/29,279.16
  6. Step 6: Final answer
    x = 21,873.55

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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.