Home / 15,212.28-20,990.88-8,497.08

Finding the Fourth Proportional to 15,212.28, 20,990.88 and 8,497.08

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Solution

The fourth proportional to 15,212.28, 20,990.88 and 8,497.08 is: 11,724.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,212.28 : 20,990.88 = 8,497.08 : x
  2. Step 2: Convert to fraction form
    15,212.28/20,990.88 = 8,497.08/x
  3. Step 3: Cross multiply
    15,212.28x = 20,990.88 × 8,497.08
  4. Step 4: Simplify right side
    15,212.28x = 178,361,186.63
  5. Step 5: Solve for x
    x = 178,361,186.63/15,212.28
  6. Step 6: Final answer
    x = 11,724.82

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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.