Home / 7,312.25-10,968.78-2,118.53

Finding the Fourth Proportional to 7,312.25, 10,968.78 and 2,118.53

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Solution

The fourth proportional to 7,312.25, 10,968.78 and 2,118.53 is: 3,177.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.25 : 10,968.78 = 2,118.53 : x
  2. Step 2: Convert to fraction form
    7,312.25/10,968.78 = 2,118.53/x
  3. Step 3: Cross multiply
    7,312.25x = 10,968.78 × 2,118.53
  4. Step 4: Simplify right side
    7,312.25x = 23,237,689.49
  5. Step 5: Solve for x
    x = 23,237,689.49/7,312.25
  6. Step 6: Final answer
    x = 3,177.91

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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.