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Finding the Fourth Proportional to 21,713.76, 30,172.05 and 21,626.28

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Solution

The fourth proportional to 21,713.76, 30,172.05 and 21,626.28 is: 30,050.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,713.76 : 30,172.05 = 21,626.28 : x
  2. Step 2: Convert to fraction form
    21,713.76/30,172.05 = 21,626.28/x
  3. Step 3: Cross multiply
    21,713.76x = 30,172.05 × 21,626.28
  4. Step 4: Simplify right side
    21,713.76x = 652,509,201.47
  5. Step 5: Solve for x
    x = 652,509,201.47/21,713.76
  6. Step 6: Final answer
    x = 30,050.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.