Home / 28,380.18-39,151.47-18,311.85

Finding the Fourth Proportional to 28,380.18, 39,151.47 and 18,311.85

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Solution

The fourth proportional to 28,380.18, 39,151.47 and 18,311.85 is: 25,261.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.18 : 39,151.47 = 18,311.85 : x
  2. Step 2: Convert to fraction form
    28,380.18/39,151.47 = 18,311.85/x
  3. Step 3: Cross multiply
    28,380.18x = 39,151.47 × 18,311.85
  4. Step 4: Simplify right side
    28,380.18x = 716,935,845.92
  5. Step 5: Solve for x
    x = 716,935,845.92/28,380.18
  6. Step 6: Final answer
    x = 25,261.85

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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.