Home / 28,120.95-42,195.15-12,323.79

Finding the Fourth Proportional to 28,120.95, 42,195.15 and 12,323.79

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Solution

The fourth proportional to 28,120.95, 42,195.15 and 12,323.79 is: 18,491.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.95 : 42,195.15 = 12,323.79 : x
  2. Step 2: Convert to fraction form
    28,120.95/42,195.15 = 12,323.79/x
  3. Step 3: Cross multiply
    28,120.95x = 42,195.15 × 12,323.79
  4. Step 4: Simplify right side
    28,120.95x = 520,004,167.62
  5. Step 5: Solve for x
    x = 520,004,167.62/28,120.95
  6. Step 6: Final answer
    x = 18,491.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.