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Finding the Fourth Proportional to 22,376.76, 30,826.50 and 15,649.80

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Solution

The fourth proportional to 22,376.76, 30,826.50 and 15,649.80 is: 21,559.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,376.76 : 30,826.50 = 15,649.80 : x
  2. Step 2: Convert to fraction form
    22,376.76/30,826.50 = 15,649.80/x
  3. Step 3: Cross multiply
    22,376.76x = 30,826.50 × 15,649.80
  4. Step 4: Simplify right side
    22,376.76x = 482,428,559.70
  5. Step 5: Solve for x
    x = 482,428,559.70/22,376.76
  6. Step 6: Final answer
    x = 21,559.36

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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.