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Finding the Fourth Proportional to 8,759.78, 13,139.67 and 4,372.82

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Solution

The fourth proportional to 8,759.78, 13,139.67 and 4,372.82 is: 6,559.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.78 : 13,139.67 = 4,372.82 : x
  2. Step 2: Convert to fraction form
    8,759.78/13,139.67 = 4,372.82/x
  3. Step 3: Cross multiply
    8,759.78x = 13,139.67 × 4,372.82
  4. Step 4: Simplify right side
    8,759.78x = 57,457,411.77
  5. Step 5: Solve for x
    x = 57,457,411.77/8,759.78
  6. Step 6: Final answer
    x = 6,559.23

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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.