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Finding the Fourth Proportional to 29,269.92, 40,392.20 and 15,840.90

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Solution

The fourth proportional to 29,269.92, 40,392.20 and 15,840.90 is: 21,860.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,269.92 : 40,392.20 = 15,840.90 : x
  2. Step 2: Convert to fraction form
    29,269.92/40,392.20 = 15,840.90/x
  3. Step 3: Cross multiply
    29,269.92x = 40,392.20 × 15,840.90
  4. Step 4: Simplify right side
    29,269.92x = 639,848,840.58
  5. Step 5: Solve for x
    x = 639,848,840.58/29,269.92
  6. Step 6: Final answer
    x = 21,860.28

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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.