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Finding the Fourth Proportional to 21,886.93, 32,622.19 and 20,641.25

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Solution

The fourth proportional to 21,886.93, 32,622.19 and 20,641.25 is: 30,765.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,886.93 : 32,622.19 = 20,641.25 : x
  2. Step 2: Convert to fraction form
    21,886.93/32,622.19 = 20,641.25/x
  3. Step 3: Cross multiply
    21,886.93x = 32,622.19 × 20,641.25
  4. Step 4: Simplify right side
    21,886.93x = 673,362,513.02
  5. Step 5: Solve for x
    x = 673,362,513.02/21,886.93
  6. Step 6: Final answer
    x = 30,765.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.