Home / 21,886.20-30,209.76-13,390.92

Finding the Fourth Proportional to 21,886.20, 30,209.76 and 13,390.92

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Solution

The fourth proportional to 21,886.20, 30,209.76 and 13,390.92 is: 18,483.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.20 : 30,209.76 = 13,390.92 : x
  2. Step 2: Convert to fraction form
    21,886.20/30,209.76 = 13,390.92/x
  3. Step 3: Cross multiply
    21,886.20x = 30,209.76 × 13,390.92
  4. Step 4: Simplify right side
    21,886.20x = 404,536,479.38
  5. Step 5: Solve for x
    x = 404,536,479.38/21,886.20
  6. Step 6: Final answer
    x = 18,483.63

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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.