Home / 21,986.28-30,342.96-12,557.88

Finding the Fourth Proportional to 21,986.28, 30,342.96 and 12,557.88

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Solution

The fourth proportional to 21,986.28, 30,342.96 and 12,557.88 is: 17,330.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,986.28 : 30,342.96 = 12,557.88 : x
  2. Step 2: Convert to fraction form
    21,986.28/30,342.96 = 12,557.88/x
  3. Step 3: Cross multiply
    21,986.28x = 30,342.96 × 12,557.88
  4. Step 4: Simplify right side
    21,986.28x = 381,043,250.52
  5. Step 5: Solve for x
    x = 381,043,250.52/21,986.28
  6. Step 6: Final answer
    x = 17,330.96

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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.