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Finding the Fourth Proportional to 27,291.60, 40,871.64 and 15,569.28

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Solution

The fourth proportional to 27,291.60, 40,871.64 and 15,569.28 is: 23,316.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,291.60 : 40,871.64 = 15,569.28 : x
  2. Step 2: Convert to fraction form
    27,291.60/40,871.64 = 15,569.28/x
  3. Step 3: Cross multiply
    27,291.60x = 40,871.64 × 15,569.28
  4. Step 4: Simplify right side
    27,291.60x = 636,342,007.22
  5. Step 5: Solve for x
    x = 636,342,007.22/27,291.60
  6. Step 6: Final answer
    x = 23,316.41

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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.