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Finding the Fourth Proportional to 14,405.70, 21,608.55 and 11,125.20

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Solution

The fourth proportional to 14,405.70, 21,608.55 and 11,125.20 is: 16,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,405.70 : 21,608.55 = 11,125.20 : x
  2. Step 2: Convert to fraction form
    14,405.70/21,608.55 = 11,125.20/x
  3. Step 3: Cross multiply
    14,405.70x = 21,608.55 × 11,125.20
  4. Step 4: Simplify right side
    14,405.70x = 240,399,440.46
  5. Step 5: Solve for x
    x = 240,399,440.46/14,405.70
  6. Step 6: Final answer
    x = 16,687.80

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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.