Home / 21,979.45-30,326.38-13,025.41

Finding the Fourth Proportional to 21,979.45, 30,326.38 and 13,025.41

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Solution

The fourth proportional to 21,979.45, 30,326.38 and 13,025.41 is: 17,971.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.45 : 30,326.38 = 13,025.41 : x
  2. Step 2: Convert to fraction form
    21,979.45/30,326.38 = 13,025.41/x
  3. Step 3: Cross multiply
    21,979.45x = 30,326.38 × 13,025.41
  4. Step 4: Simplify right side
    21,979.45x = 395,013,533.32
  5. Step 5: Solve for x
    x = 395,013,533.32/21,979.45
  6. Step 6: Final answer
    x = 17,971.95

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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.