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Finding the Fourth Proportional to 8,762.13, 13,143.33 and 2,918.75

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Solution

The fourth proportional to 8,762.13, 13,143.33 and 2,918.75 is: 4,378.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.13 : 13,143.33 = 2,918.75 : x
  2. Step 2: Convert to fraction form
    8,762.13/13,143.33 = 2,918.75/x
  3. Step 3: Cross multiply
    8,762.13x = 13,143.33 × 2,918.75
  4. Step 4: Simplify right side
    8,762.13x = 38,362,094.44
  5. Step 5: Solve for x
    x = 38,362,094.44/8,762.13
  6. Step 6: Final answer
    x = 4,378.17

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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.