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Finding the Fourth Proportional to 21,653.88, 32,486.22 and 11,803.20

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Solution

The fourth proportional to 21,653.88, 32,486.22 and 11,803.20 is: 17,707.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.88 : 32,486.22 = 11,803.20 : x
  2. Step 2: Convert to fraction form
    21,653.88/32,486.22 = 11,803.20/x
  3. Step 3: Cross multiply
    21,653.88x = 32,486.22 × 11,803.20
  4. Step 4: Simplify right side
    21,653.88x = 383,441,351.90
  5. Step 5: Solve for x
    x = 383,441,351.90/21,653.88
  6. Step 6: Final answer
    x = 17,707.74

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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.