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Finding the Fourth Proportional to 8,760.96, 13,138.21 and 6,890.51

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Solution

The fourth proportional to 8,760.96, 13,138.21 and 6,890.51 is: 10,333.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,760.96 : 13,138.21 = 6,890.51 : x
  2. Step 2: Convert to fraction form
    8,760.96/13,138.21 = 6,890.51/x
  3. Step 3: Cross multiply
    8,760.96x = 13,138.21 × 6,890.51
  4. Step 4: Simplify right side
    8,760.96x = 90,528,884.47
  5. Step 5: Solve for x
    x = 90,528,884.47/8,760.96
  6. Step 6: Final answer
    x = 10,333.22

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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.