Home / 8,439.39-11,638.49-6,675.21

Finding the Fourth Proportional to 8,439.39, 11,638.49 and 6,675.21

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Solution

The fourth proportional to 8,439.39, 11,638.49 and 6,675.21 is: 9,205.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.39 : 11,638.49 = 6,675.21 : x
  2. Step 2: Convert to fraction form
    8,439.39/11,638.49 = 6,675.21/x
  3. Step 3: Cross multiply
    8,439.39x = 11,638.49 × 6,675.21
  4. Step 4: Simplify right side
    8,439.39x = 77,689,331.46
  5. Step 5: Solve for x
    x = 77,689,331.46/8,439.39
  6. Step 6: Final answer
    x = 9,205.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.