Home / 20,932.02-28,885.68-11,978.95

Finding the Fourth Proportional to 20,932.02, 28,885.68 and 11,978.95

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Solution

The fourth proportional to 20,932.02, 28,885.68 and 11,978.95 is: 16,530.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.02 : 28,885.68 = 11,978.95 : x
  2. Step 2: Convert to fraction form
    20,932.02/28,885.68 = 11,978.95/x
  3. Step 3: Cross multiply
    20,932.02x = 28,885.68 × 11,978.95
  4. Step 4: Simplify right side
    20,932.02x = 346,020,116.44
  5. Step 5: Solve for x
    x = 346,020,116.44/20,932.02
  6. Step 6: Final answer
    x = 16,530.66

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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.