Home / 5,117.85-7,678.40-3,171.42

Finding the Fourth Proportional to 5,117.85, 7,678.40 and 3,171.42

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Solution

The fourth proportional to 5,117.85, 7,678.40 and 3,171.42 is: 4,758.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,117.85 : 7,678.40 = 3,171.42 : x
  2. Step 2: Convert to fraction form
    5,117.85/7,678.40 = 3,171.42/x
  3. Step 3: Cross multiply
    5,117.85x = 7,678.40 × 3,171.42
  4. Step 4: Simplify right side
    5,117.85x = 24,351,415.47
  5. Step 5: Solve for x
    x = 24,351,415.47/5,117.85
  6. Step 6: Final answer
    x = 4,758.13

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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.