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Finding the Fourth Proportional to 7,790.64, 11,659.08 and 7,151.28

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Solution

The fourth proportional to 7,790.64, 11,659.08 and 7,151.28 is: 10,702.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,790.64 : 11,659.08 = 7,151.28 : x
  2. Step 2: Convert to fraction form
    7,790.64/11,659.08 = 7,151.28/x
  3. Step 3: Cross multiply
    7,790.64x = 11,659.08 × 7,151.28
  4. Step 4: Simplify right side
    7,790.64x = 83,377,345.62
  5. Step 5: Solve for x
    x = 83,377,345.62/7,790.64
  6. Step 6: Final answer
    x = 10,702.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.