Home / 28,230.90-38,958.63-15,655.65

Finding the Fourth Proportional to 28,230.90, 38,958.63 and 15,655.65

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Solution

The fourth proportional to 28,230.90, 38,958.63 and 15,655.65 is: 21,604.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.90 : 38,958.63 = 15,655.65 : x
  2. Step 2: Convert to fraction form
    28,230.90/38,958.63 = 15,655.65/x
  3. Step 3: Cross multiply
    28,230.90x = 38,958.63 × 15,655.65
  4. Step 4: Simplify right side
    28,230.90x = 609,922,470.96
  5. Step 5: Solve for x
    x = 609,922,470.96/28,230.90
  6. Step 6: Final answer
    x = 21,604.79

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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.