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Finding the Fourth Proportional to 21,187.85, 29,250.11 and 14,928.17

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Solution

The fourth proportional to 21,187.85, 29,250.11 and 14,928.17 is: 20,608.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.85 : 29,250.11 = 14,928.17 : x
  2. Step 2: Convert to fraction form
    21,187.85/29,250.11 = 14,928.17/x
  3. Step 3: Cross multiply
    21,187.85x = 29,250.11 × 14,928.17
  4. Step 4: Simplify right side
    21,187.85x = 436,650,505.67
  5. Step 5: Solve for x
    x = 436,650,505.67/21,187.85
  6. Step 6: Final answer
    x = 20,608.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.