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Finding the Fourth Proportional to 31,940.99, 44,031.30 and 20,454.68

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Solution

The fourth proportional to 31,940.99, 44,031.30 and 20,454.68 is: 28,197.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,940.99 : 44,031.30 = 20,454.68 : x
  2. Step 2: Convert to fraction form
    31,940.99/44,031.30 = 20,454.68/x
  3. Step 3: Cross multiply
    31,940.99x = 44,031.30 × 20,454.68
  4. Step 4: Simplify right side
    31,940.99x = 900,646,151.48
  5. Step 5: Solve for x
    x = 900,646,151.48/31,940.99
  6. Step 6: Final answer
    x = 28,197.19

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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.