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Finding the Fourth Proportional to 28,113.41, 42,177.44 and 8,391.98

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Solution

The fourth proportional to 28,113.41, 42,177.44 and 8,391.98 is: 12,590.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,113.41 : 42,177.44 = 8,391.98 : x
  2. Step 2: Convert to fraction form
    28,113.41/42,177.44 = 8,391.98/x
  3. Step 3: Cross multiply
    28,113.41x = 42,177.44 × 8,391.98
  4. Step 4: Simplify right side
    28,113.41x = 353,952,359.35
  5. Step 5: Solve for x
    x = 353,952,359.35/28,113.41
  6. Step 6: Final answer
    x = 12,590.16

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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.