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Finding the Fourth Proportional to 22,486.50, 30,806.10 and 21,645.18

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Solution

The fourth proportional to 22,486.50, 30,806.10 and 21,645.18 is: 29,653.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,486.50 : 30,806.10 = 21,645.18 : x
  2. Step 2: Convert to fraction form
    22,486.50/30,806.10 = 21,645.18/x
  3. Step 3: Cross multiply
    22,486.50x = 30,806.10 × 21,645.18
  4. Step 4: Simplify right side
    22,486.50x = 666,803,579.60
  5. Step 5: Solve for x
    x = 666,803,579.60/22,486.50
  6. Step 6: Final answer
    x = 29,653.51

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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.