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Finding the Fourth Proportional to 31,995.60, 44,142.60 and 21,391.92

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Solution

The fourth proportional to 31,995.60, 44,142.60 and 21,391.92 is: 29,513.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,995.60 : 44,142.60 = 21,391.92 : x
  2. Step 2: Convert to fraction form
    31,995.60/44,142.60 = 21,391.92/x
  3. Step 3: Cross multiply
    31,995.60x = 44,142.60 × 21,391.92
  4. Step 4: Simplify right side
    31,995.60x = 944,294,967.79
  5. Step 5: Solve for x
    x = 944,294,967.79/31,995.60
  6. Step 6: Final answer
    x = 29,513.28

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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.