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Finding the Fourth Proportional to 18,937.68, 26,124.69 and 12,220.75

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Solution

The fourth proportional to 18,937.68, 26,124.69 and 12,220.75 is: 16,858.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.68 : 26,124.69 = 12,220.75 : x
  2. Step 2: Convert to fraction form
    18,937.68/26,124.69 = 12,220.75/x
  3. Step 3: Cross multiply
    18,937.68x = 26,124.69 × 12,220.75
  4. Step 4: Simplify right side
    18,937.68x = 319,263,305.32
  5. Step 5: Solve for x
    x = 319,263,305.32/18,937.68
  6. Step 6: Final answer
    x = 16,858.63

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Half scale
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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.