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Finding the Fourth Proportional to 9,138.84, 12,611.64 and 4,947.12

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Solution

The fourth proportional to 9,138.84, 12,611.64 and 4,947.12 is: 6,827.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.84 : 12,611.64 = 4,947.12 : x
  2. Step 2: Convert to fraction form
    9,138.84/12,611.64 = 4,947.12/x
  3. Step 3: Cross multiply
    9,138.84x = 12,611.64 × 4,947.12
  4. Step 4: Simplify right side
    9,138.84x = 62,391,296.48
  5. Step 5: Solve for x
    x = 62,391,296.48/9,138.84
  6. Step 6: Final answer
    x = 6,827.05

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Half scale
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Double scale
Find fourth proportional to 9,139.84, 12,613.02 and 4,948.12
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.