Home / 28,405.38-39,199.69-15,659.04

Finding the Fourth Proportional to 28,405.38, 39,199.69 and 15,659.04

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Solution

The fourth proportional to 28,405.38, 39,199.69 and 15,659.04 is: 21,609.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.38 : 39,199.69 = 15,659.04 : x
  2. Step 2: Convert to fraction form
    28,405.38/39,199.69 = 15,659.04/x
  3. Step 3: Cross multiply
    28,405.38x = 39,199.69 × 15,659.04
  4. Step 4: Simplify right side
    28,405.38x = 613,829,513.70
  5. Step 5: Solve for x
    x = 613,829,513.70/28,405.38
  6. Step 6: Final answer
    x = 21,609.62

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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.