Home / 21,979.50-30,331.73-12,547.86

Finding the Fourth Proportional to 21,979.50, 30,331.73 and 12,547.86

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Solution

The fourth proportional to 21,979.50, 30,331.73 and 12,547.86 is: 17,316.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.50 : 30,331.73 = 12,547.86 : x
  2. Step 2: Convert to fraction form
    21,979.50/30,331.73 = 12,547.86/x
  3. Step 3: Cross multiply
    21,979.50x = 30,331.73 × 12,547.86
  4. Step 4: Simplify right side
    21,979.50x = 380,598,301.60
  5. Step 5: Solve for x
    x = 380,598,301.60/21,979.50
  6. Step 6: Final answer
    x = 17,316.06

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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.