Home / 40,378.52-55,686.92-28,272.80

Finding the Fourth Proportional to 40,378.52, 55,686.92 and 28,272.80

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Solution

The fourth proportional to 40,378.52, 55,686.92 and 28,272.80 is: 38,991.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,378.52 : 55,686.92 = 28,272.80 : x
  2. Step 2: Convert to fraction form
    40,378.52/55,686.92 = 28,272.80/x
  3. Step 3: Cross multiply
    40,378.52x = 55,686.92 × 28,272.80
  4. Step 4: Simplify right side
    40,378.52x = 1,574,425,151.78
  5. Step 5: Solve for x
    x = 1,574,425,151.78/40,378.52
  6. Step 6: Final answer
    x = 38,991.65

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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.