Home / 20,908.77-28,856.15-11,957.59

Finding the Fourth Proportional to 20,908.77, 28,856.15 and 11,957.59

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Solution

The fourth proportional to 20,908.77, 28,856.15 and 11,957.59 is: 16,502.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.77 : 28,856.15 = 11,957.59 : x
  2. Step 2: Convert to fraction form
    20,908.77/28,856.15 = 11,957.59/x
  3. Step 3: Cross multiply
    20,908.77x = 28,856.15 × 11,957.59
  4. Step 4: Simplify right side
    20,908.77x = 345,050,010.68
  5. Step 5: Solve for x
    x = 345,050,010.68/20,908.77
  6. Step 6: Final answer
    x = 16,502.65

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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.