Home / 20,320.92-28,042.72-11,823.20

Finding the Fourth Proportional to 20,320.92, 28,042.72 and 11,823.20

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Solution

The fourth proportional to 20,320.92, 28,042.72 and 11,823.20 is: 16,315.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.92 : 28,042.72 = 11,823.20 : x
  2. Step 2: Convert to fraction form
    20,320.92/28,042.72 = 11,823.20/x
  3. Step 3: Cross multiply
    20,320.92x = 28,042.72 × 11,823.20
  4. Step 4: Simplify right side
    20,320.92x = 331,554,687.10
  5. Step 5: Solve for x
    x = 331,554,687.10/20,320.92
  6. Step 6: Final answer
    x = 16,315.93

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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.