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Finding the Fourth Proportional to 14,211.51, 21,310.78 and 6,819.45

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Solution

The fourth proportional to 14,211.51, 21,310.78 and 6,819.45 is: 10,226.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,211.51 : 21,310.78 = 6,819.45 : x
  2. Step 2: Convert to fraction form
    14,211.51/21,310.78 = 6,819.45/x
  3. Step 3: Cross multiply
    14,211.51x = 21,310.78 × 6,819.45
  4. Step 4: Simplify right side
    14,211.51x = 145,327,798.67
  5. Step 5: Solve for x
    x = 145,327,798.67/14,211.51
  6. Step 6: Final answer
    x = 10,226.06

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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.