Home / 20,392.92-28,139.77-11,318.24

Finding the Fourth Proportional to 20,392.92, 28,139.77 and 11,318.24

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Solution

The fourth proportional to 20,392.92, 28,139.77 and 11,318.24 is: 15,617.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.92 : 28,139.77 = 11,318.24 : x
  2. Step 2: Convert to fraction form
    20,392.92/28,139.77 = 11,318.24/x
  3. Step 3: Cross multiply
    20,392.92x = 28,139.77 × 11,318.24
  4. Step 4: Simplify right side
    20,392.92x = 318,492,604.46
  5. Step 5: Solve for x
    x = 318,492,604.46/20,392.92
  6. Step 6: Final answer
    x = 15,617.80

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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.