Home / 28,142.72-38,837.26-15,395.63

Finding the Fourth Proportional to 28,142.72, 38,837.26 and 15,395.63

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Solution

The fourth proportional to 28,142.72, 38,837.26 and 15,395.63 is: 21,246.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.72 : 38,837.26 = 15,395.63 : x
  2. Step 2: Convert to fraction form
    28,142.72/38,837.26 = 15,395.63/x
  3. Step 3: Cross multiply
    28,142.72x = 38,837.26 × 15,395.63
  4. Step 4: Simplify right side
    28,142.72x = 597,923,949.59
  5. Step 5: Solve for x
    x = 597,923,949.59/28,142.72
  6. Step 6: Final answer
    x = 21,246.13

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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.