Home / 20,764.96-28,659.36-12,382

Finding the Fourth Proportional to 20,764.96, 28,659.36 and 12,382

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Solution

The fourth proportional to 20,764.96, 28,659.36 and 12,382 is: 17,089.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.96 : 28,659.36 = 12,382 : x
  2. Step 2: Convert to fraction form
    20,764.96/28,659.36 = 12,382/x
  3. Step 3: Cross multiply
    20,764.96x = 28,659.36 × 12,382
  4. Step 4: Simplify right side
    20,764.96x = 354,860,195.52
  5. Step 5: Solve for x
    x = 354,860,195.52/20,764.96
  6. Step 6: Final answer
    x = 17,089.38

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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.