Home / 5,087.43-7,631.24-1,390.05

Finding the Fourth Proportional to 5,087.43, 7,631.24 and 1,390.05

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Solution

The fourth proportional to 5,087.43, 7,631.24 and 1,390.05 is: 2,085.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,087.43 : 7,631.24 = 1,390.05 : x
  2. Step 2: Convert to fraction form
    5,087.43/7,631.24 = 1,390.05/x
  3. Step 3: Cross multiply
    5,087.43x = 7,631.24 × 1,390.05
  4. Step 4: Simplify right side
    5,087.43x = 10,607,805.16
  5. Step 5: Solve for x
    x = 10,607,805.16/5,087.43
  6. Step 6: Final answer
    x = 2,085.10

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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.