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Finding the Fourth Proportional to 29,291.45, 40,422.11 and 15,862.70

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Solution

The fourth proportional to 29,291.45, 40,422.11 and 15,862.70 is: 21,890.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,291.45 : 40,422.11 = 15,862.70 : x
  2. Step 2: Convert to fraction form
    29,291.45/40,422.11 = 15,862.70/x
  3. Step 3: Cross multiply
    29,291.45x = 40,422.11 × 15,862.70
  4. Step 4: Simplify right side
    29,291.45x = 641,203,641.84
  5. Step 5: Solve for x
    x = 641,203,641.84/29,291.45
  6. Step 6: Final answer
    x = 21,890.47

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.