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Finding the Fourth Proportional to 21,602.60, 29,802.82 and 13,223.96

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Solution

The fourth proportional to 21,602.60, 29,802.82 and 13,223.96 is: 18,243.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,602.60 : 29,802.82 = 13,223.96 : x
  2. Step 2: Convert to fraction form
    21,602.60/29,802.82 = 13,223.96/x
  3. Step 3: Cross multiply
    21,602.60x = 29,802.82 × 13,223.96
  4. Step 4: Simplify right side
    21,602.60x = 394,111,299.57
  5. Step 5: Solve for x
    x = 394,111,299.57/21,602.60
  6. Step 6: Final answer
    x = 18,243.70

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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.