Home / 4,920.78-7,343.10-4,395.12

Finding the Fourth Proportional to 4,920.78, 7,343.10 and 4,395.12

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Solution

The fourth proportional to 4,920.78, 7,343.10 and 4,395.12 is: 6,558.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.78 : 7,343.10 = 4,395.12 : x
  2. Step 2: Convert to fraction form
    4,920.78/7,343.10 = 4,395.12/x
  3. Step 3: Cross multiply
    4,920.78x = 7,343.10 × 4,395.12
  4. Step 4: Simplify right side
    4,920.78x = 32,273,805.67
  5. Step 5: Solve for x
    x = 32,273,805.67/4,920.78
  6. Step 6: Final answer
    x = 6,558.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.