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Finding the Fourth Proportional to 21,762.39, 29,836.51 and 21,368.73

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Solution

The fourth proportional to 21,762.39, 29,836.51 and 21,368.73 is: 29,296.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,762.39 : 29,836.51 = 21,368.73 : x
  2. Step 2: Convert to fraction form
    21,762.39/29,836.51 = 21,368.73/x
  3. Step 3: Cross multiply
    21,762.39x = 29,836.51 × 21,368.73
  4. Step 4: Simplify right side
    21,762.39x = 637,568,070.31
  5. Step 5: Solve for x
    x = 637,568,070.31/21,762.39
  6. Step 6: Final answer
    x = 29,296.79

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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.