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Finding the Fourth Proportional to 7,178.80, 10,774.87 and 3,671.32

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Solution

The fourth proportional to 7,178.80, 10,774.87 and 3,671.32 is: 5,510.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,178.80 : 10,774.87 = 3,671.32 : x
  2. Step 2: Convert to fraction form
    7,178.80/10,774.87 = 3,671.32/x
  3. Step 3: Cross multiply
    7,178.80x = 10,774.87 × 3,671.32
  4. Step 4: Simplify right side
    7,178.80x = 39,557,973.31
  5. Step 5: Solve for x
    x = 39,557,973.31/7,178.80
  6. Step 6: Final answer
    x = 5,510.38

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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.