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Finding the Fourth Proportional to 21,609.70, 32,401.59 and 8,446.39

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Solution

The fourth proportional to 21,609.70, 32,401.59 and 8,446.39 is: 12,664.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,609.70 : 32,401.59 = 8,446.39 : x
  2. Step 2: Convert to fraction form
    21,609.70/32,401.59 = 8,446.39/x
  3. Step 3: Cross multiply
    21,609.70x = 32,401.59 × 8,446.39
  4. Step 4: Simplify right side
    21,609.70x = 273,676,465.76
  5. Step 5: Solve for x
    x = 273,676,465.76/21,609.70
  6. Step 6: Final answer
    x = 12,664.52

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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.