Home / 28,003.12-38,642.92-15,425.52

Finding the Fourth Proportional to 28,003.12, 38,642.92 and 15,425.52

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Solution

The fourth proportional to 28,003.12, 38,642.92 and 15,425.52 is: 21,286.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,003.12 : 38,642.92 = 15,425.52 : x
  2. Step 2: Convert to fraction form
    28,003.12/38,642.92 = 15,425.52/x
  3. Step 3: Cross multiply
    28,003.12x = 38,642.92 × 15,425.52
  4. Step 4: Simplify right side
    28,003.12x = 596,087,135.32
  5. Step 5: Solve for x
    x = 596,087,135.32/28,003.12
  6. Step 6: Final answer
    x = 21,286.45

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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.