Home / 8,638.41-11,920.70-5,281.37

Finding the Fourth Proportional to 8,638.41, 11,920.70 and 5,281.37

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Solution

The fourth proportional to 8,638.41, 11,920.70 and 5,281.37 is: 7,288.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.41 : 11,920.70 = 5,281.37 : x
  2. Step 2: Convert to fraction form
    8,638.41/11,920.70 = 5,281.37/x
  3. Step 3: Cross multiply
    8,638.41x = 11,920.70 × 5,281.37
  4. Step 4: Simplify right side
    8,638.41x = 62,957,625.66
  5. Step 5: Solve for x
    x = 62,957,625.66/8,638.41
  6. Step 6: Final answer
    x = 7,288.10

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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.