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Finding the Fourth Proportional to 22,461.63, 30,772.40 and 21,620.45

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Solution

The fourth proportional to 22,461.63, 30,772.40 and 21,620.45 is: 29,619.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,461.63 : 30,772.40 = 21,620.45 : x
  2. Step 2: Convert to fraction form
    22,461.63/30,772.40 = 21,620.45/x
  3. Step 3: Cross multiply
    22,461.63x = 30,772.40 × 21,620.45
  4. Step 4: Simplify right side
    22,461.63x = 665,312,873.62
  5. Step 5: Solve for x
    x = 665,312,873.62/22,461.63
  6. Step 6: Final answer
    x = 29,619.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.