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Finding the Fourth Proportional to 21,618, 32,385.04 and 14,199.95

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Solution

The fourth proportional to 21,618, 32,385.04 and 14,199.95 is: 21,272.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,618 : 32,385.04 = 14,199.95 : x
  2. Step 2: Convert to fraction form
    21,618/32,385.04 = 14,199.95/x
  3. Step 3: Cross multiply
    21,618x = 32,385.04 × 14,199.95
  4. Step 4: Simplify right side
    21,618x = 459,865,948.75
  5. Step 5: Solve for x
    x = 459,865,948.75/21,618
  6. Step 6: Final answer
    x = 21,272.36

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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.