Home / 20,864.63-28,793.91-11,433.20

Finding the Fourth Proportional to 20,864.63, 28,793.91 and 11,433.20

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Solution

The fourth proportional to 20,864.63, 28,793.91 and 11,433.20 is: 15,778.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.63 : 28,793.91 = 11,433.20 : x
  2. Step 2: Convert to fraction form
    20,864.63/28,793.91 = 11,433.20/x
  3. Step 3: Cross multiply
    20,864.63x = 28,793.91 × 11,433.20
  4. Step 4: Simplify right side
    20,864.63x = 329,206,531.81
  5. Step 5: Solve for x
    x = 329,206,531.81/20,864.63
  6. Step 6: Final answer
    x = 15,778.21

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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.