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Finding the Fourth Proportional to 21,892.59, 32,786.28 and 12,504.20

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Solution

The fourth proportional to 21,892.59, 32,786.28 and 12,504.20 is: 18,726.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,892.59 : 32,786.28 = 12,504.20 : x
  2. Step 2: Convert to fraction form
    21,892.59/32,786.28 = 12,504.20/x
  3. Step 3: Cross multiply
    21,892.59x = 32,786.28 × 12,504.20
  4. Step 4: Simplify right side
    21,892.59x = 409,966,038.44
  5. Step 5: Solve for x
    x = 409,966,038.44/21,892.59
  6. Step 6: Final answer
    x = 18,726.25

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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.