Home / 15,031.12-20,748.76-13,456.48

Finding the Fourth Proportional to 15,031.12, 20,748.76 and 13,456.48

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Solution

The fourth proportional to 15,031.12, 20,748.76 and 13,456.48 is: 18,575.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,031.12 : 20,748.76 = 13,456.48 : x
  2. Step 2: Convert to fraction form
    15,031.12/20,748.76 = 13,456.48/x
  3. Step 3: Cross multiply
    15,031.12x = 20,748.76 × 13,456.48
  4. Step 4: Simplify right side
    15,031.12x = 279,205,273.96
  5. Step 5: Solve for x
    x = 279,205,273.96/15,031.12
  6. Step 6: Final answer
    x = 18,575.15

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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.