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Finding the Fourth Proportional to 9,151.84, 12,630 and 5,119.12

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Solution

The fourth proportional to 9,151.84, 12,630 and 5,119.12 is: 7,064.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,151.84 : 12,630 = 5,119.12 : x
  2. Step 2: Convert to fraction form
    9,151.84/12,630 = 5,119.12/x
  3. Step 3: Cross multiply
    9,151.84x = 12,630 × 5,119.12
  4. Step 4: Simplify right side
    9,151.84x = 64,654,485.60
  5. Step 5: Solve for x
    x = 64,654,485.60/9,151.84
  6. Step 6: Final answer
    x = 7,064.64

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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.