Home / 15,494.49-21,382.28-8,420.96

Finding the Fourth Proportional to 15,494.49, 21,382.28 and 8,420.96

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Solution

The fourth proportional to 15,494.49, 21,382.28 and 8,420.96 is: 11,620.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.49 : 21,382.28 = 8,420.96 : x
  2. Step 2: Convert to fraction form
    15,494.49/21,382.28 = 8,420.96/x
  3. Step 3: Cross multiply
    15,494.49x = 21,382.28 × 8,420.96
  4. Step 4: Simplify right side
    15,494.49x = 180,059,367.52
  5. Step 5: Solve for x
    x = 180,059,367.52/15,494.49
  6. Step 6: Final answer
    x = 11,620.86

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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.