Home / 28,659.86-39,549.88-15,912.65

Finding the Fourth Proportional to 28,659.86, 39,549.88 and 15,912.65

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Solution

The fourth proportional to 28,659.86, 39,549.88 and 15,912.65 is: 21,959.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,659.86 : 39,549.88 = 15,912.65 : x
  2. Step 2: Convert to fraction form
    28,659.86/39,549.88 = 15,912.65/x
  3. Step 3: Cross multiply
    28,659.86x = 39,549.88 × 15,912.65
  4. Step 4: Simplify right side
    28,659.86x = 629,343,516.75
  5. Step 5: Solve for x
    x = 629,343,516.75/28,659.86
  6. Step 6: Final answer
    x = 21,959.06

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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.