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Finding the Fourth Proportional to 7,969.60, 12,007.60 and 7,339.84

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Solution

The fourth proportional to 7,969.60, 12,007.60 and 7,339.84 is: 11,058.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,969.60 : 12,007.60 = 7,339.84 : x
  2. Step 2: Convert to fraction form
    7,969.60/12,007.60 = 7,339.84/x
  3. Step 3: Cross multiply
    7,969.60x = 12,007.60 × 7,339.84
  4. Step 4: Simplify right side
    7,969.60x = 88,133,862.78
  5. Step 5: Solve for x
    x = 88,133,862.78/7,969.60
  6. Step 6: Final answer
    x = 11,058.76

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