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Finding the Fourth Proportional to 8,763.48, 13,125.78 and 4,865.40

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Solution

The fourth proportional to 8,763.48, 13,125.78 and 4,865.40 is: 7,287.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.48 : 13,125.78 = 4,865.40 : x
  2. Step 2: Convert to fraction form
    8,763.48/13,125.78 = 4,865.40/x
  3. Step 3: Cross multiply
    8,763.48x = 13,125.78 × 4,865.40
  4. Step 4: Simplify right side
    8,763.48x = 63,862,170.01
  5. Step 5: Solve for x
    x = 63,862,170.01/8,763.48
  6. Step 6: Final answer
    x = 7,287.31

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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.