Home / 8,990.46-12,408.39-5,636.16

Finding the Fourth Proportional to 8,990.46, 12,408.39 and 5,636.16

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Solution

The fourth proportional to 8,990.46, 12,408.39 and 5,636.16 is: 7,778.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.46 : 12,408.39 = 5,636.16 : x
  2. Step 2: Convert to fraction form
    8,990.46/12,408.39 = 5,636.16/x
  3. Step 3: Cross multiply
    8,990.46x = 12,408.39 × 5,636.16
  4. Step 4: Simplify right side
    8,990.46x = 69,935,671.38
  5. Step 5: Solve for x
    x = 69,935,671.38/8,990.46
  6. Step 6: Final answer
    x = 7,778.88

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Half scale
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Double scale
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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.