Home / 8,680.78-13,017.28-5,172.44

Finding the Fourth Proportional to 8,680.78, 13,017.28 and 5,172.44

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Solution

The fourth proportional to 8,680.78, 13,017.28 and 5,172.44 is: 7,756.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.78 : 13,017.28 = 5,172.44 : x
  2. Step 2: Convert to fraction form
    8,680.78/13,017.28 = 5,172.44/x
  3. Step 3: Cross multiply
    8,680.78x = 13,017.28 × 5,172.44
  4. Step 4: Simplify right side
    8,680.78x = 67,331,119.38
  5. Step 5: Solve for x
    x = 67,331,119.38/8,680.78
  6. Step 6: Final answer
    x = 7,756.35

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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.