Home / 21,788.56-30,071.28-12,716.90

Finding the Fourth Proportional to 21,788.56, 30,071.28 and 12,716.90

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Solution

The fourth proportional to 21,788.56, 30,071.28 and 12,716.90 is: 17,551.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,788.56 : 30,071.28 = 12,716.90 : x
  2. Step 2: Convert to fraction form
    21,788.56/30,071.28 = 12,716.90/x
  3. Step 3: Cross multiply
    21,788.56x = 30,071.28 × 12,716.90
  4. Step 4: Simplify right side
    21,788.56x = 382,413,470.73
  5. Step 5: Solve for x
    x = 382,413,470.73/21,788.56
  6. Step 6: Final answer
    x = 17,551.11

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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.