Home / 5,638.80-8,456.91-2,129.18

Finding the Fourth Proportional to 5,638.80, 8,456.91 and 2,129.18

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Solution

The fourth proportional to 5,638.80, 8,456.91 and 2,129.18 is: 3,193.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.80 : 8,456.91 = 2,129.18 : x
  2. Step 2: Convert to fraction form
    5,638.80/8,456.91 = 2,129.18/x
  3. Step 3: Cross multiply
    5,638.80x = 8,456.91 × 2,129.18
  4. Step 4: Simplify right side
    5,638.80x = 18,006,283.63
  5. Step 5: Solve for x
    x = 18,006,283.63/5,638.80
  6. Step 6: Final answer
    x = 3,193.28

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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.