Home / 5,087.40-7,631.02-1,389.54

Finding the Fourth Proportional to 5,087.40, 7,631.02 and 1,389.54

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Solution

The fourth proportional to 5,087.40, 7,631.02 and 1,389.54 is: 2,084.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,087.40 : 7,631.02 = 1,389.54 : x
  2. Step 2: Convert to fraction form
    5,087.40/7,631.02 = 1,389.54/x
  3. Step 3: Cross multiply
    5,087.40x = 7,631.02 × 1,389.54
  4. Step 4: Simplify right side
    5,087.40x = 10,603,607.53
  5. Step 5: Solve for x
    x = 10,603,607.53/5,087.40
  6. Step 6: Final answer
    x = 2,084.29

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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.