Home / 5,123.78-7,684.58-2,490.15

Finding the Fourth Proportional to 5,123.78, 7,684.58 and 2,490.15

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Solution

The fourth proportional to 5,123.78, 7,684.58 and 2,490.15 is: 3,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.78 : 7,684.58 = 2,490.15 : x
  2. Step 2: Convert to fraction form
    5,123.78/7,684.58 = 2,490.15/x
  3. Step 3: Cross multiply
    5,123.78x = 7,684.58 × 2,490.15
  4. Step 4: Simplify right side
    5,123.78x = 19,135,763.11
  5. Step 5: Solve for x
    x = 19,135,763.11/5,123.78
  6. Step 6: Final answer
    x = 3,734.70

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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.