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Finding the Fourth Proportional to 8,762.16, 13,110.30 and 5,239.20

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Solution

The fourth proportional to 8,762.16, 13,110.30 and 5,239.20 is: 7,839.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.16 : 13,110.30 = 5,239.20 : x
  2. Step 2: Convert to fraction form
    8,762.16/13,110.30 = 5,239.20/x
  3. Step 3: Cross multiply
    8,762.16x = 13,110.30 × 5,239.20
  4. Step 4: Simplify right side
    8,762.16x = 68,687,483.76
  5. Step 5: Solve for x
    x = 68,687,483.76/8,762.16
  6. Step 6: Final answer
    x = 7,839.10

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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.