Home / 15,480.55-21,363.24-8,406.97

Finding the Fourth Proportional to 15,480.55, 21,363.24 and 8,406.97

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Solution

The fourth proportional to 15,480.55, 21,363.24 and 8,406.97 is: 11,601.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,480.55 : 21,363.24 = 8,406.97 : x
  2. Step 2: Convert to fraction form
    15,480.55/21,363.24 = 8,406.97/x
  3. Step 3: Cross multiply
    15,480.55x = 21,363.24 × 8,406.97
  4. Step 4: Simplify right side
    15,480.55x = 179,600,010.97
  5. Step 5: Solve for x
    x = 179,600,010.97/15,480.55
  6. Step 6: Final answer
    x = 11,601.66

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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.