Home / 5,638.47-7,780.93-3,120.49

Finding the Fourth Proportional to 5,638.47, 7,780.93 and 3,120.49

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Solution

The fourth proportional to 5,638.47, 7,780.93 and 3,120.49 is: 4,306.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.47 : 7,780.93 = 3,120.49 : x
  2. Step 2: Convert to fraction form
    5,638.47/7,780.93 = 3,120.49/x
  3. Step 3: Cross multiply
    5,638.47x = 7,780.93 × 3,120.49
  4. Step 4: Simplify right side
    5,638.47x = 24,280,314.26
  5. Step 5: Solve for x
    x = 24,280,314.26/5,638.47
  6. Step 6: Final answer
    x = 4,306.19

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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.