Home / 8,569.10-12,865.80-5,288.60

Finding the Fourth Proportional to 8,569.10, 12,865.80 and 5,288.60

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Solution

The fourth proportional to 8,569.10, 12,865.80 and 5,288.60 is: 7,940.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,569.10 : 12,865.80 = 5,288.60 : x
  2. Step 2: Convert to fraction form
    8,569.10/12,865.80 = 5,288.60/x
  3. Step 3: Cross multiply
    8,569.10x = 12,865.80 × 5,288.60
  4. Step 4: Simplify right side
    8,569.10x = 68,042,069.88
  5. Step 5: Solve for x
    x = 68,042,069.88/8,569.10
  6. Step 6: Final answer
    x = 7,940.40

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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.