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Finding the Fourth Proportional to 21,301.59, 29,394.39 and 12,349.59

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Solution

The fourth proportional to 21,301.59, 29,394.39 and 12,349.59 is: 17,041.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,301.59 : 29,394.39 = 12,349.59 : x
  2. Step 2: Convert to fraction form
    21,301.59/29,394.39 = 12,349.59/x
  3. Step 3: Cross multiply
    21,301.59x = 29,394.39 × 12,349.59
  4. Step 4: Simplify right side
    21,301.59x = 363,008,664.80
  5. Step 5: Solve for x
    x = 363,008,664.80/21,301.59
  6. Step 6: Final answer
    x = 17,041.39

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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.