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Finding the Fourth Proportional to 28,026.28, 42,039.42 and 8,305.12

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Solution

The fourth proportional to 28,026.28, 42,039.42 and 8,305.12 is: 12,457.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,026.28 : 42,039.42 = 8,305.12 : x
  2. Step 2: Convert to fraction form
    28,026.28/42,039.42 = 8,305.12/x
  3. Step 3: Cross multiply
    28,026.28x = 42,039.42 × 8,305.12
  4. Step 4: Simplify right side
    28,026.28x = 349,142,427.83
  5. Step 5: Solve for x
    x = 349,142,427.83/28,026.28
  6. Step 6: Final answer
    x = 12,457.68

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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.