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Finding the Fourth Proportional to 8,689.77, 13,020.08 and 6,954.75

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Solution

The fourth proportional to 8,689.77, 13,020.08 and 6,954.75 is: 10,420.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.77 : 13,020.08 = 6,954.75 : x
  2. Step 2: Convert to fraction form
    8,689.77/13,020.08 = 6,954.75/x
  3. Step 3: Cross multiply
    8,689.77x = 13,020.08 × 6,954.75
  4. Step 4: Simplify right side
    8,689.77x = 90,551,366.61
  5. Step 5: Solve for x
    x = 90,551,366.61/8,689.77
  6. Step 6: Final answer
    x = 10,420.46

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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.