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Finding the Fourth Proportional to 8,759.45, 13,143.09 and 4,758.05

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Solution

The fourth proportional to 8,759.45, 13,143.09 and 4,758.05 is: 7,139.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.45 : 13,143.09 = 4,758.05 : x
  2. Step 2: Convert to fraction form
    8,759.45/13,143.09 = 4,758.05/x
  3. Step 3: Cross multiply
    8,759.45x = 13,143.09 × 4,758.05
  4. Step 4: Simplify right side
    8,759.45x = 62,535,479.37
  5. Step 5: Solve for x
    x = 62,535,479.37/8,759.45
  6. Step 6: Final answer
    x = 7,139.20

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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.