Home / 9,266.78-12,787.20-5,287.13

Finding the Fourth Proportional to 9,266.78, 12,787.20 and 5,287.13

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Solution

The fourth proportional to 9,266.78, 12,787.20 and 5,287.13 is: 7,295.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,266.78 : 12,787.20 = 5,287.13 : x
  2. Step 2: Convert to fraction form
    9,266.78/12,787.20 = 5,287.13/x
  3. Step 3: Cross multiply
    9,266.78x = 12,787.20 × 5,287.13
  4. Step 4: Simplify right side
    9,266.78x = 67,607,524.80
  5. Step 5: Solve for x
    x = 67,607,524.80/9,266.78
  6. Step 6: Final answer
    x = 7,295.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.