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Finding the Fourth Proportional to 5,672.80, 7,828.55 and 3,155.01

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Solution

The fourth proportional to 5,672.80, 7,828.55 and 3,155.01 is: 4,353.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,672.80 : 7,828.55 = 3,155.01 : x
  2. Step 2: Convert to fraction form
    5,672.80/7,828.55 = 3,155.01/x
  3. Step 3: Cross multiply
    5,672.80x = 7,828.55 × 3,155.01
  4. Step 4: Simplify right side
    5,672.80x = 24,699,175.28
  5. Step 5: Solve for x
    x = 24,699,175.28/5,672.80
  6. Step 6: Final answer
    x = 4,353.97

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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.