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Finding the Fourth Proportional to 17,979.83, 26,978.84 and 12,124.13

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Solution

The fourth proportional to 17,979.83, 26,978.84 and 12,124.13 is: 18,192.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,979.83 : 26,978.84 = 12,124.13 : x
  2. Step 2: Convert to fraction form
    17,979.83/26,978.84 = 12,124.13/x
  3. Step 3: Cross multiply
    17,979.83x = 26,978.84 × 12,124.13
  4. Step 4: Simplify right side
    17,979.83x = 327,094,963.41
  5. Step 5: Solve for x
    x = 327,094,963.41/17,979.83
  6. Step 6: Final answer
    x = 18,192.33

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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.