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Finding the Fourth Proportional to 8,672.40, 13,008.60 and 5,719.95

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Solution

The fourth proportional to 8,672.40, 13,008.60 and 5,719.95 is: 8,579.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,672.40 : 13,008.60 = 5,719.95 : x
  2. Step 2: Convert to fraction form
    8,672.40/13,008.60 = 5,719.95/x
  3. Step 3: Cross multiply
    8,672.40x = 13,008.60 × 5,719.95
  4. Step 4: Simplify right side
    8,672.40x = 74,408,541.57
  5. Step 5: Solve for x
    x = 74,408,541.57/8,672.40
  6. Step 6: Final answer
    x = 8,579.93

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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.