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Finding the Fourth Proportional to 21,761.35, 30,030.39 and 12,201.19

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Solution

The fourth proportional to 21,761.35, 30,030.39 and 12,201.19 is: 16,837.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.35 : 30,030.39 = 12,201.19 : x
  2. Step 2: Convert to fraction form
    21,761.35/30,030.39 = 12,201.19/x
  3. Step 3: Cross multiply
    21,761.35x = 30,030.39 × 12,201.19
  4. Step 4: Simplify right side
    21,761.35x = 366,406,494.16
  5. Step 5: Solve for x
    x = 366,406,494.16/21,761.35
  6. Step 6: Final answer
    x = 16,837.49

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Double 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.