Home / 5,638.10-7,780.59-3,120.32

Finding the Fourth Proportional to 5,638.10, 7,780.59 and 3,120.32

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Solution

The fourth proportional to 5,638.10, 7,780.59 and 3,120.32 is: 4,306.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.10 : 7,780.59 = 3,120.32 : x
  2. Step 2: Convert to fraction form
    5,638.10/7,780.59 = 3,120.32/x
  3. Step 3: Cross multiply
    5,638.10x = 7,780.59 × 3,120.32
  4. Step 4: Simplify right side
    5,638.10x = 24,277,930.59
  5. Step 5: Solve for x
    x = 24,277,930.59/5,638.10
  6. Step 6: Final answer
    x = 4,306.05

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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.