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Finding the Fourth Proportional to 22,159.71, 30,580.70 and 13,212.41

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Solution

The fourth proportional to 22,159.71, 30,580.70 and 13,212.41 is: 18,233.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,159.71 : 30,580.70 = 13,212.41 : x
  2. Step 2: Convert to fraction form
    22,159.71/30,580.70 = 13,212.41/x
  3. Step 3: Cross multiply
    22,159.71x = 30,580.70 × 13,212.41
  4. Step 4: Simplify right side
    22,159.71x = 404,044,527.52
  5. Step 5: Solve for x
    x = 404,044,527.52/22,159.71
  6. Step 6: Final answer
    x = 18,233.29

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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.