Home / 21,947.17-30,286.88-11,875.39

Finding the Fourth Proportional to 21,947.17, 30,286.88 and 11,875.39

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Solution

The fourth proportional to 21,947.17, 30,286.88 and 11,875.39 is: 16,387.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,947.17 : 30,286.88 = 11,875.39 : x
  2. Step 2: Convert to fraction form
    21,947.17/30,286.88 = 11,875.39/x
  3. Step 3: Cross multiply
    21,947.17x = 30,286.88 × 11,875.39
  4. Step 4: Simplify right side
    21,947.17x = 359,668,511.88
  5. Step 5: Solve for x
    x = 359,668,511.88/21,947.17
  6. Step 6: Final answer
    x = 16,387.92

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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.