Home / 20,454.64-28,220.10-11,953.74

Finding the Fourth Proportional to 20,454.64, 28,220.10 and 11,953.74

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Solution

The fourth proportional to 20,454.64, 28,220.10 and 11,953.74 is: 16,491.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,454.64 : 28,220.10 = 11,953.74 : x
  2. Step 2: Convert to fraction form
    20,454.64/28,220.10 = 11,953.74/x
  3. Step 3: Cross multiply
    20,454.64x = 28,220.10 × 11,953.74
  4. Step 4: Simplify right side
    20,454.64x = 337,335,799.17
  5. Step 5: Solve for x
    x = 337,335,799.17/20,454.64
  6. Step 6: Final answer
    x = 16,491.89

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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.