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Finding the Fourth Proportional to 14,144.70, 21,211.65 and 4,280.70

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Solution

The fourth proportional to 14,144.70, 21,211.65 and 4,280.70 is: 6,419.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,144.70 : 21,211.65 = 4,280.70 : x
  2. Step 2: Convert to fraction form
    14,144.70/21,211.65 = 4,280.70/x
  3. Step 3: Cross multiply
    14,144.70x = 21,211.65 × 4,280.70
  4. Step 4: Simplify right side
    14,144.70x = 90,800,710.16
  5. Step 5: Solve for x
    x = 90,800,710.16/14,144.70
  6. Step 6: Final answer
    x = 6,419.42

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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.