Home / 21,979.46-30,331.48-12,548

Finding the Fourth Proportional to 21,979.46, 30,331.48 and 12,548

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Solution

The fourth proportional to 21,979.46, 30,331.48 and 12,548 is: 17,316.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.46 : 30,331.48 = 12,548 : x
  2. Step 2: Convert to fraction form
    21,979.46/30,331.48 = 12,548/x
  3. Step 3: Cross multiply
    21,979.46x = 30,331.48 × 12,548
  4. Step 4: Simplify right side
    21,979.46x = 380,599,411.04
  5. Step 5: Solve for x
    x = 380,599,411.04/21,979.46
  6. Step 6: Final answer
    x = 17,316.14

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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.