Home / 47,760.40-71,640.60-12,221.65

Finding the Fourth Proportional to 47,760.40, 71,640.60 and 12,221.65

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Solution

The fourth proportional to 47,760.40, 71,640.60 and 12,221.65 is: 18,332.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,760.40 : 71,640.60 = 12,221.65 : x
  2. Step 2: Convert to fraction form
    47,760.40/71,640.60 = 12,221.65/x
  3. Step 3: Cross multiply
    47,760.40x = 71,640.60 × 12,221.65
  4. Step 4: Simplify right side
    47,760.40x = 875,566,338.99
  5. Step 5: Solve for x
    x = 875,566,338.99/47,760.40
  6. Step 6: Final answer
    x = 18,332.48

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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.