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Finding the Fourth Proportional to 9,181.85, 12,671.05 and 4,990.10

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Solution

The fourth proportional to 9,181.85, 12,671.05 and 4,990.10 is: 6,886.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,181.85 : 12,671.05 = 4,990.10 : x
  2. Step 2: Convert to fraction form
    9,181.85/12,671.05 = 4,990.10/x
  3. Step 3: Cross multiply
    9,181.85x = 12,671.05 × 4,990.10
  4. Step 4: Simplify right side
    9,181.85x = 63,229,718.30
  5. Step 5: Solve for x
    x = 63,229,718.30/9,181.85
  6. Step 6: Final answer
    x = 6,886.38

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.