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Finding the Fourth Proportional to 7,712.68, 11,569.04 and 1,869.28

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Solution

The fourth proportional to 7,712.68, 11,569.04 and 1,869.28 is: 2,803.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,712.68 : 11,569.04 = 1,869.28 : x
  2. Step 2: Convert to fraction form
    7,712.68/11,569.04 = 1,869.28/x
  3. Step 3: Cross multiply
    7,712.68x = 11,569.04 × 1,869.28
  4. Step 4: Simplify right side
    7,712.68x = 21,625,775.09
  5. Step 5: Solve for x
    x = 21,625,775.09/7,712.68
  6. Step 6: Final answer
    x = 2,803.92

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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.