Home / 28,230.76-38,960.20-15,655.52

Finding the Fourth Proportional to 28,230.76, 38,960.20 and 15,655.52

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Solution

The fourth proportional to 28,230.76, 38,960.20 and 15,655.52 is: 21,605.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.76 : 38,960.20 = 15,655.52 : x
  2. Step 2: Convert to fraction form
    28,230.76/38,960.20 = 15,655.52/x
  3. Step 3: Cross multiply
    28,230.76x = 38,960.20 × 15,655.52
  4. Step 4: Simplify right side
    28,230.76x = 609,942,190.30
  5. Step 5: Solve for x
    x = 609,942,190.30/28,230.76
  6. Step 6: Final answer
    x = 21,605.59

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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.