Home / 5,151.78-7,727.70-1,865.40

Finding the Fourth Proportional to 5,151.78, 7,727.70 and 1,865.40

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Solution

The fourth proportional to 5,151.78, 7,727.70 and 1,865.40 is: 2,798.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,151.78 : 7,727.70 = 1,865.40 : x
  2. Step 2: Convert to fraction form
    5,151.78/7,727.70 = 1,865.40/x
  3. Step 3: Cross multiply
    5,151.78x = 7,727.70 × 1,865.40
  4. Step 4: Simplify right side
    5,151.78x = 14,415,251.58
  5. Step 5: Solve for x
    x = 14,415,251.58/5,151.78
  6. Step 6: Final answer
    x = 2,798.11

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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.