Home / 2,123.62-3,187.80-1,247.14

Finding the Fourth Proportional to 2,123.62, 3,187.80 and 1,247.14

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Solution

The fourth proportional to 2,123.62, 3,187.80 and 1,247.14 is: 1,872.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,123.62 : 3,187.80 = 1,247.14 : x
  2. Step 2: Convert to fraction form
    2,123.62/3,187.80 = 1,247.14/x
  3. Step 3: Cross multiply
    2,123.62x = 3,187.80 × 1,247.14
  4. Step 4: Simplify right side
    2,123.62x = 3,975,632.89
  5. Step 5: Solve for x
    x = 3,975,632.89/2,123.62
  6. Step 6: Final answer
    x = 1,872.10

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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.