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Finding the Fourth Proportional to 8,762.40, 13,143.72 and 4,081.08

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Solution

The fourth proportional to 8,762.40, 13,143.72 and 4,081.08 is: 6,121.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,762.40 : 13,143.72 = 4,081.08 : x
  2. Step 2: Convert to fraction form
    8,762.40/13,143.72 = 4,081.08/x
  3. Step 3: Cross multiply
    8,762.40x = 13,143.72 × 4,081.08
  4. Step 4: Simplify right side
    8,762.40x = 53,640,614.45
  5. Step 5: Solve for x
    x = 53,640,614.45/8,762.40
  6. Step 6: Final answer
    x = 6,121.68

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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.