Home / 5,638.40-7,781.16-3,542.60

Finding the Fourth Proportional to 5,638.40, 7,781.16 and 3,542.60

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Solution

The fourth proportional to 5,638.40, 7,781.16 and 3,542.60 is: 4,888.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.40 : 7,781.16 = 3,542.60 : x
  2. Step 2: Convert to fraction form
    5,638.40/7,781.16 = 3,542.60/x
  3. Step 3: Cross multiply
    5,638.40x = 7,781.16 × 3,542.60
  4. Step 4: Simplify right side
    5,638.40x = 27,565,537.42
  5. Step 5: Solve for x
    x = 27,565,537.42/5,638.40
  6. Step 6: Final answer
    x = 4,888.89

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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.