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Finding the Fourth Proportional to 28,026.78, 42,040.17 and 8,305.62

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Solution

The fourth proportional to 28,026.78, 42,040.17 and 8,305.62 is: 12,458.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,026.78 : 42,040.17 = 8,305.62 : x
  2. Step 2: Convert to fraction form
    28,026.78/42,040.17 = 8,305.62/x
  3. Step 3: Cross multiply
    28,026.78x = 42,040.17 × 8,305.62
  4. Step 4: Simplify right side
    28,026.78x = 349,169,676.76
  5. Step 5: Solve for x
    x = 349,169,676.76/28,026.78
  6. Step 6: Final answer
    x = 12,458.43

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Half scale
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Double scale
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Similar ratio
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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.