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Finding the Fourth Proportional to 21,761.88, 29,835.82 and 21,368.22

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Solution

The fourth proportional to 21,761.88, 29,835.82 and 21,368.22 is: 29,296.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.88 : 29,835.82 = 21,368.22 : x
  2. Step 2: Convert to fraction form
    21,761.88/29,835.82 = 21,368.22/x
  3. Step 3: Cross multiply
    21,761.88x = 29,835.82 × 21,368.22
  4. Step 4: Simplify right side
    21,761.88x = 637,538,258.80
  5. Step 5: Solve for x
    x = 637,538,258.80/21,761.88
  6. Step 6: Final answer
    x = 29,296.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.