Home / 28,142.47-38,836.91-15,395.38

Finding the Fourth Proportional to 28,142.47, 38,836.91 and 15,395.38

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Solution

The fourth proportional to 28,142.47, 38,836.91 and 15,395.38 is: 21,245.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.47 : 38,836.91 = 15,395.38 : x
  2. Step 2: Convert to fraction form
    28,142.47/38,836.91 = 15,395.38/x
  3. Step 3: Cross multiply
    28,142.47x = 38,836.91 × 15,395.38
  4. Step 4: Simplify right side
    28,142.47x = 597,908,928.87
  5. Step 5: Solve for x
    x = 597,908,928.87/28,142.47
  6. Step 6: Final answer
    x = 21,245.79

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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.