Home / 28,405.17-39,199.13-15,658.56

Finding the Fourth Proportional to 28,405.17, 39,199.13 and 15,658.56

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Solution

The fourth proportional to 28,405.17, 39,199.13 and 15,658.56 is: 21,608.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.17 : 39,199.13 = 15,658.56 : x
  2. Step 2: Convert to fraction form
    28,405.17/39,199.13 = 15,658.56/x
  3. Step 3: Cross multiply
    28,405.17x = 39,199.13 × 15,658.56
  4. Step 4: Simplify right side
    28,405.17x = 613,801,850.76
  5. Step 5: Solve for x
    x = 613,801,850.76/28,405.17
  6. Step 6: Final answer
    x = 21,608.81

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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.