Home / 20,805.62-28,711.78-11,374.18

Finding the Fourth Proportional to 20,805.62, 28,711.78 and 11,374.18

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Solution

The fourth proportional to 20,805.62, 28,711.78 and 11,374.18 is: 15,696.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.62 : 28,711.78 = 11,374.18 : x
  2. Step 2: Convert to fraction form
    20,805.62/28,711.78 = 11,374.18/x
  3. Step 3: Cross multiply
    20,805.62x = 28,711.78 × 11,374.18
  4. Step 4: Simplify right side
    20,805.62x = 326,572,953.84
  5. Step 5: Solve for x
    x = 326,572,953.84/20,805.62
  6. Step 6: Final answer
    x = 15,696.38

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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.