Home / 28,077.72-38,745.90-15,331.38

Finding the Fourth Proportional to 28,077.72, 38,745.90 and 15,331.38

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Solution

The fourth proportional to 28,077.72, 38,745.90 and 15,331.38 is: 21,156.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,077.72 : 38,745.90 = 15,331.38 : x
  2. Step 2: Convert to fraction form
    28,077.72/38,745.90 = 15,331.38/x
  3. Step 3: Cross multiply
    28,077.72x = 38,745.90 × 15,331.38
  4. Step 4: Simplify right side
    28,077.72x = 594,028,116.34
  5. Step 5: Solve for x
    x = 594,028,116.34/28,077.72
  6. Step 6: Final answer
    x = 21,156.57

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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.