Home / 20,805.84-28,711.62-11,374.20

Finding the Fourth Proportional to 20,805.84, 28,711.62 and 11,374.20

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Solution

The fourth proportional to 20,805.84, 28,711.62 and 11,374.20 is: 15,696.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805.84 : 28,711.62 = 11,374.20 : x
  2. Step 2: Convert to fraction form
    20,805.84/28,711.62 = 11,374.20/x
  3. Step 3: Cross multiply
    20,805.84x = 28,711.62 × 11,374.20
  4. Step 4: Simplify right side
    20,805.84x = 326,571,708.20
  5. Step 5: Solve for x
    x = 326,571,708.20/20,805.84
  6. Step 6: Final answer
    x = 15,696.16

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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.