Home / 28,189.31-38,900.80-15,442.38

Finding the Fourth Proportional to 28,189.31, 38,900.80 and 15,442.38

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Solution

The fourth proportional to 28,189.31, 38,900.80 and 15,442.38 is: 21,310.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,189.31 : 38,900.80 = 15,442.38 : x
  2. Step 2: Convert to fraction form
    28,189.31/38,900.80 = 15,442.38/x
  3. Step 3: Cross multiply
    28,189.31x = 38,900.80 × 15,442.38
  4. Step 4: Simplify right side
    28,189.31x = 600,720,955.21
  5. Step 5: Solve for x
    x = 600,720,955.21/28,189.31
  6. Step 6: Final answer
    x = 21,310.24

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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.