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Finding the Fourth Proportional to 20,656.69, 30,979.49 and 8,967.13

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Solution

The fourth proportional to 20,656.69, 30,979.49 and 8,967.13 is: 13,448.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,656.69 : 30,979.49 = 8,967.13 : x
  2. Step 2: Convert to fraction form
    20,656.69/30,979.49 = 8,967.13/x
  3. Step 3: Cross multiply
    20,656.69x = 30,979.49 × 8,967.13
  4. Step 4: Simplify right side
    20,656.69x = 277,796,959.27
  5. Step 5: Solve for x
    x = 277,796,959.27/20,656.69
  6. Step 6: Final answer
    x = 13,448.28

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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.