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Finding the Fourth Proportional to 8,679.71, 13,014.55 and 7,641.79

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Solution

The fourth proportional to 8,679.71, 13,014.55 and 7,641.79 is: 11,458.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,679.71 : 13,014.55 = 7,641.79 : x
  2. Step 2: Convert to fraction form
    8,679.71/13,014.55 = 7,641.79/x
  3. Step 3: Cross multiply
    8,679.71x = 13,014.55 × 7,641.79
  4. Step 4: Simplify right side
    8,679.71x = 99,454,486.77
  5. Step 5: Solve for x
    x = 99,454,486.77/8,679.71
  6. Step 6: Final answer
    x = 11,458.28

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1.5x scale

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.