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Finding the Fourth Proportional to 21,602.71, 29,812.36 and 12,649.37

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Solution

The fourth proportional to 21,602.71, 29,812.36 and 12,649.37 is: 17,456.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,602.71 : 29,812.36 = 12,649.37 : x
  2. Step 2: Convert to fraction form
    21,602.71/29,812.36 = 12,649.37/x
  3. Step 3: Cross multiply
    21,602.71x = 29,812.36 × 12,649.37
  4. Step 4: Simplify right side
    21,602.71x = 377,107,572.21
  5. Step 5: Solve for x
    x = 377,107,572.21/21,602.71
  6. Step 6: Final answer
    x = 17,456.49

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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.