Home / 31,988.82-44,125.20-20,640.54

Finding the Fourth Proportional to 31,988.82, 44,125.20 and 20,640.54

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Solution

The fourth proportional to 31,988.82, 44,125.20 and 20,640.54 is: 28,471.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,988.82 : 44,125.20 = 20,640.54 : x
  2. Step 2: Convert to fraction form
    31,988.82/44,125.20 = 20,640.54/x
  3. Step 3: Cross multiply
    31,988.82x = 44,125.20 × 20,640.54
  4. Step 4: Simplify right side
    31,988.82x = 910,767,955.61
  5. Step 5: Solve for x
    x = 910,767,955.61/31,988.82
  6. Step 6: Final answer
    x = 28,471.45

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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.