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Finding the Fourth Proportional to 18,934.76, 26,143.76 and 12,224.32

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Solution

The fourth proportional to 18,934.76, 26,143.76 and 12,224.32 is: 16,878.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,934.76 : 26,143.76 = 12,224.32 : x
  2. Step 2: Convert to fraction form
    18,934.76/26,143.76 = 12,224.32/x
  3. Step 3: Cross multiply
    18,934.76x = 26,143.76 × 12,224.32
  4. Step 4: Simplify right side
    18,934.76x = 319,589,653.44
  5. Step 5: Solve for x
    x = 319,589,653.44/18,934.76
  6. Step 6: Final answer
    x = 16,878.46

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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.