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Finding the Fourth Proportional to 7,695.40, 11,543.28 and 2,765.40

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Solution

The fourth proportional to 7,695.40, 11,543.28 and 2,765.40 is: 4,148.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,695.40 : 11,543.28 = 2,765.40 : x
  2. Step 2: Convert to fraction form
    7,695.40/11,543.28 = 2,765.40/x
  3. Step 3: Cross multiply
    7,695.40x = 11,543.28 × 2,765.40
  4. Step 4: Simplify right side
    7,695.40x = 31,921,786.51
  5. Step 5: Solve for x
    x = 31,921,786.51/7,695.40
  6. Step 6: Final answer
    x = 4,148.16

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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.