Home / 20,585.28-28,407.52-12,205.76

Finding the Fourth Proportional to 20,585.28, 28,407.52 and 12,205.76

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Solution

The fourth proportional to 20,585.28, 28,407.52 and 12,205.76 is: 16,843.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.28 : 28,407.52 = 12,205.76 : x
  2. Step 2: Convert to fraction form
    20,585.28/28,407.52 = 12,205.76/x
  3. Step 3: Cross multiply
    20,585.28x = 28,407.52 × 12,205.76
  4. Step 4: Simplify right side
    20,585.28x = 346,735,371.32
  5. Step 5: Solve for x
    x = 346,735,371.32/20,585.28
  6. Step 6: Final answer
    x = 16,843.85

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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.