Home / 22,550.95-31,119.85-12,478.79

Finding the Fourth Proportional to 22,550.95, 31,119.85 and 12,478.79

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Solution

The fourth proportional to 22,550.95, 31,119.85 and 12,478.79 is: 17,220.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,550.95 : 31,119.85 = 12,478.79 : x
  2. Step 2: Convert to fraction form
    22,550.95/31,119.85 = 12,478.79/x
  3. Step 3: Cross multiply
    22,550.95x = 31,119.85 × 12,478.79
  4. Step 4: Simplify right side
    22,550.95x = 388,337,921.14
  5. Step 5: Solve for x
    x = 388,337,921.14/22,550.95
  6. Step 6: Final answer
    x = 17,220.47

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Double scale
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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.