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Finding the Fourth Proportional to 21,836.80, 32,774.40 and 18,726.40

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Solution

The fourth proportional to 21,836.80, 32,774.40 and 18,726.40 is: 28,106.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.80 : 32,774.40 = 18,726.40 : x
  2. Step 2: Convert to fraction form
    21,836.80/32,774.40 = 18,726.40/x
  3. Step 3: Cross multiply
    21,836.80x = 32,774.40 × 18,726.40
  4. Step 4: Simplify right side
    21,836.80x = 613,746,524.16
  5. Step 5: Solve for x
    x = 613,746,524.16/21,836.80
  6. Step 6: Final answer
    x = 28,106.07

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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.