Home / 28,139.18-42,211.31-8,148.38

Finding the Fourth Proportional to 28,139.18, 42,211.31 and 8,148.38

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Solution

The fourth proportional to 28,139.18, 42,211.31 and 8,148.38 is: 12,223.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.18 : 42,211.31 = 8,148.38 : x
  2. Step 2: Convert to fraction form
    28,139.18/42,211.31 = 8,148.38/x
  3. Step 3: Cross multiply
    28,139.18x = 42,211.31 × 8,148.38
  4. Step 4: Simplify right side
    28,139.18x = 343,953,542.38
  5. Step 5: Solve for x
    x = 343,953,542.38/28,139.18
  6. Step 6: Final answer
    x = 12,223.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.