Home / 8,979.31-13,466.80-3,978.93

Finding the Fourth Proportional to 8,979.31, 13,466.80 and 3,978.93

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Solution

The fourth proportional to 8,979.31, 13,466.80 and 3,978.93 is: 5,967.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.31 : 13,466.80 = 3,978.93 : x
  2. Step 2: Convert to fraction form
    8,979.31/13,466.80 = 3,978.93/x
  3. Step 3: Cross multiply
    8,979.31x = 13,466.80 × 3,978.93
  4. Step 4: Simplify right side
    8,979.31x = 53,583,454.52
  5. Step 5: Solve for x
    x = 53,583,454.52/8,979.31
  6. Step 6: Final answer
    x = 5,967.44

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1.5x scale

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.