Home / 20,638.16-28,480.92-11,206.88

Finding the Fourth Proportional to 20,638.16, 28,480.92 and 11,206.88

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Solution

The fourth proportional to 20,638.16, 28,480.92 and 11,206.88 is: 15,465.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.16 : 28,480.92 = 11,206.88 : x
  2. Step 2: Convert to fraction form
    20,638.16/28,480.92 = 11,206.88/x
  3. Step 3: Cross multiply
    20,638.16x = 28,480.92 × 11,206.88
  4. Step 4: Simplify right side
    20,638.16x = 319,182,252.73
  5. Step 5: Solve for x
    x = 319,182,252.73/20,638.16
  6. Step 6: Final answer
    x = 15,465.64

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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.