Home / 28,486.96-39,311.92-15,911.68

Finding the Fourth Proportional to 28,486.96, 39,311.92 and 15,911.68

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Solution

The fourth proportional to 28,486.96, 39,311.92 and 15,911.68 is: 21,958.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,486.96 : 39,311.92 = 15,911.68 : x
  2. Step 2: Convert to fraction form
    28,486.96/39,311.92 = 15,911.68/x
  3. Step 3: Cross multiply
    28,486.96x = 39,311.92 × 15,911.68
  4. Step 4: Simplify right side
    28,486.96x = 625,518,691.23
  5. Step 5: Solve for x
    x = 625,518,691.23/28,486.96
  6. Step 6: Final answer
    x = 21,958.07

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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.