Home / 20,665.44-28,524.24-15,377.76

Finding the Fourth Proportional to 20,665.44, 28,524.24 and 15,377.76

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Solution

The fourth proportional to 20,665.44, 28,524.24 and 15,377.76 is: 21,225.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.44 : 28,524.24 = 15,377.76 : x
  2. Step 2: Convert to fraction form
    20,665.44/28,524.24 = 15,377.76/x
  3. Step 3: Cross multiply
    20,665.44x = 28,524.24 × 15,377.76
  4. Step 4: Simplify right side
    20,665.44x = 438,638,916.90
  5. Step 5: Solve for x
    x = 438,638,916.90/20,665.44
  6. Step 6: Final answer
    x = 21,225.72

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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.