Home / 20,875.11-28,809.65-11,923.95

Finding the Fourth Proportional to 20,875.11, 28,809.65 and 11,923.95

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Solution

The fourth proportional to 20,875.11, 28,809.65 and 11,923.95 is: 16,456.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.11 : 28,809.65 = 11,923.95 : x
  2. Step 2: Convert to fraction form
    20,875.11/28,809.65 = 11,923.95/x
  3. Step 3: Cross multiply
    20,875.11x = 28,809.65 × 11,923.95
  4. Step 4: Simplify right side
    20,875.11x = 343,524,826.12
  5. Step 5: Solve for x
    x = 343,524,826.12/20,875.11
  6. Step 6: Final answer
    x = 16,456.19

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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.