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Finding the Fourth Proportional to 21,963.80, 32,945.70 and 8,809.40

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Solution

The fourth proportional to 21,963.80, 32,945.70 and 8,809.40 is: 13,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,963.80 : 32,945.70 = 8,809.40 : x
  2. Step 2: Convert to fraction form
    21,963.80/32,945.70 = 8,809.40/x
  3. Step 3: Cross multiply
    21,963.80x = 32,945.70 × 8,809.40
  4. Step 4: Simplify right side
    21,963.80x = 290,231,849.58
  5. Step 5: Solve for x
    x = 290,231,849.58/21,963.80
  6. Step 6: Final answer
    x = 13,214.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.