Home / 8,979.89-12,391.54-5,395.03

Finding the Fourth Proportional to 8,979.89, 12,391.54 and 5,395.03

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Solution

The fourth proportional to 8,979.89, 12,391.54 and 5,395.03 is: 7,444.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.89 : 12,391.54 = 5,395.03 : x
  2. Step 2: Convert to fraction form
    8,979.89/12,391.54 = 5,395.03/x
  3. Step 3: Cross multiply
    8,979.89x = 12,391.54 × 5,395.03
  4. Step 4: Simplify right side
    8,979.89x = 66,852,685.58
  5. Step 5: Solve for x
    x = 66,852,685.58/8,979.89
  6. Step 6: Final answer
    x = 7,444.72

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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.