Home / 8,935.78-12,331.70-5,398.31

Finding the Fourth Proportional to 8,935.78, 12,331.70 and 5,398.31

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Solution

The fourth proportional to 8,935.78, 12,331.70 and 5,398.31 is: 7,449.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,935.78 : 12,331.70 = 5,398.31 : x
  2. Step 2: Convert to fraction form
    8,935.78/12,331.70 = 5,398.31/x
  3. Step 3: Cross multiply
    8,935.78x = 12,331.70 × 5,398.31
  4. Step 4: Simplify right side
    8,935.78x = 66,570,306.35
  5. Step 5: Solve for x
    x = 66,570,306.35/8,935.78
  6. Step 6: Final answer
    x = 7,449.86

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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.