Home / 20,390.33-28,154.59-13,223.66

Finding the Fourth Proportional to 20,390.33, 28,154.59 and 13,223.66

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Solution

The fourth proportional to 20,390.33, 28,154.59 and 13,223.66 is: 18,258.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.33 : 28,154.59 = 13,223.66 : x
  2. Step 2: Convert to fraction form
    20,390.33/28,154.59 = 13,223.66/x
  3. Step 3: Cross multiply
    20,390.33x = 28,154.59 × 13,223.66
  4. Step 4: Simplify right side
    20,390.33x = 372,306,551.77
  5. Step 5: Solve for x
    x = 372,306,551.77/20,390.33
  6. Step 6: Final answer
    x = 18,258.97

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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.