Home / 20,338.82-28,064.34-11,386.70

Finding the Fourth Proportional to 20,338.82, 28,064.34 and 11,386.70

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Solution

The fourth proportional to 20,338.82, 28,064.34 and 11,386.70 is: 15,711.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,338.82 : 28,064.34 = 11,386.70 : x
  2. Step 2: Convert to fraction form
    20,338.82/28,064.34 = 11,386.70/x
  3. Step 3: Cross multiply
    20,338.82x = 28,064.34 × 11,386.70
  4. Step 4: Simplify right side
    20,338.82x = 319,560,220.28
  5. Step 5: Solve for x
    x = 319,560,220.28/20,338.82
  6. Step 6: Final answer
    x = 15,711.84

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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.