Home / 22,400.76-30,911.32-12,840.54

Finding the Fourth Proportional to 22,400.76, 30,911.32 and 12,840.54

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Solution

The fourth proportional to 22,400.76, 30,911.32 and 12,840.54 is: 17,718.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,400.76 : 30,911.32 = 12,840.54 : x
  2. Step 2: Convert to fraction form
    22,400.76/30,911.32 = 12,840.54/x
  3. Step 3: Cross multiply
    22,400.76x = 30,911.32 × 12,840.54
  4. Step 4: Simplify right side
    22,400.76x = 396,918,040.91
  5. Step 5: Solve for x
    x = 396,918,040.91/22,400.76
  6. Step 6: Final answer
    x = 17,718.95

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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.