Home / 27,997.20-38,635.80-15,421.68

Finding the Fourth Proportional to 27,997.20, 38,635.80 and 15,421.68

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Solution

The fourth proportional to 27,997.20, 38,635.80 and 15,421.68 is: 21,281.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,997.20 : 38,635.80 = 15,421.68 : x
  2. Step 2: Convert to fraction form
    27,997.20/38,635.80 = 15,421.68/x
  3. Step 3: Cross multiply
    27,997.20x = 38,635.80 × 15,421.68
  4. Step 4: Simplify right side
    27,997.20x = 595,828,944.14
  5. Step 5: Solve for x
    x = 595,828,944.14/27,997.20
  6. Step 6: Final answer
    x = 21,281.73

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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.