Home / 20,818.08-28,728.72-11,386.62

Finding the Fourth Proportional to 20,818.08, 28,728.72 and 11,386.62

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Solution

The fourth proportional to 20,818.08, 28,728.72 and 11,386.62 is: 15,713.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.08 : 28,728.72 = 11,386.62 : x
  2. Step 2: Convert to fraction form
    20,818.08/28,728.72 = 11,386.62/x
  3. Step 3: Cross multiply
    20,818.08x = 28,728.72 × 11,386.62
  4. Step 4: Simplify right side
    20,818.08x = 327,123,017.73
  5. Step 5: Solve for x
    x = 327,123,017.73/20,818.08
  6. Step 6: Final answer
    x = 15,713.41

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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.