Home / 3,876.78-5,814.65-1,103.70

Finding the Fourth Proportional to 3,876.78, 5,814.65 and 1,103.70

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Solution

The fourth proportional to 3,876.78, 5,814.65 and 1,103.70 is: 1,655.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.78 : 5,814.65 = 1,103.70 : x
  2. Step 2: Convert to fraction form
    3,876.78/5,814.65 = 1,103.70/x
  3. Step 3: Cross multiply
    3,876.78x = 5,814.65 × 1,103.70
  4. Step 4: Simplify right side
    3,876.78x = 6,417,631.96
  5. Step 5: Solve for x
    x = 6,417,631.96/3,876.78
  6. Step 6: Final answer
    x = 1,655.40

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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.