Home / 20,585.20-28,407.66-11,153.76

Finding the Fourth Proportional to 20,585.20, 28,407.66 and 11,153.76

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Solution

The fourth proportional to 20,585.20, 28,407.66 and 11,153.76 is: 15,392.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,585.20 : 28,407.66 = 11,153.76 : x
  2. Step 2: Convert to fraction form
    20,585.20/28,407.66 = 11,153.76/x
  3. Step 3: Cross multiply
    20,585.20x = 28,407.66 × 11,153.76
  4. Step 4: Simplify right side
    20,585.20x = 316,852,221.80
  5. Step 5: Solve for x
    x = 316,852,221.80/20,585.20
  6. Step 6: Final answer
    x = 15,392.23

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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.