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Finding the Fourth Proportional to 8,717.56, 13,078.40 and 6,945.35

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Solution

The fourth proportional to 8,717.56, 13,078.40 and 6,945.35 is: 10,419.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,717.56 : 13,078.40 = 6,945.35 : x
  2. Step 2: Convert to fraction form
    8,717.56/13,078.40 = 6,945.35/x
  3. Step 3: Cross multiply
    8,717.56x = 13,078.40 × 6,945.35
  4. Step 4: Simplify right side
    8,717.56x = 90,833,965.32
  5. Step 5: Solve for x
    x = 90,833,965.32/8,717.56
  6. Step 6: Final answer
    x = 10,419.66

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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.