Home / 28,122.05-42,194.72-12,318.92

Finding the Fourth Proportional to 28,122.05, 42,194.72 and 12,318.92

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Solution

The fourth proportional to 28,122.05, 42,194.72 and 12,318.92 is: 18,483.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,122.05 : 42,194.72 = 12,318.92 : x
  2. Step 2: Convert to fraction form
    28,122.05/42,194.72 = 12,318.92/x
  3. Step 3: Cross multiply
    28,122.05x = 42,194.72 × 12,318.92
  4. Step 4: Simplify right side
    28,122.05x = 519,793,358.16
  5. Step 5: Solve for x
    x = 519,793,358.16/28,122.05
  6. Step 6: Final answer
    x = 18,483.48

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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.