Home / 28,172.70-38,836.89-21,446.62

Finding the Fourth Proportional to 28,172.70, 38,836.89 and 21,446.62

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Solution

The fourth proportional to 28,172.70, 38,836.89 and 21,446.62 is: 29,564.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,172.70 : 38,836.89 = 21,446.62 : x
  2. Step 2: Convert to fraction form
    28,172.70/38,836.89 = 21,446.62/x
  3. Step 3: Cross multiply
    28,172.70x = 38,836.89 × 21,446.62
  4. Step 4: Simplify right side
    28,172.70x = 832,920,021.81
  5. Step 5: Solve for x
    x = 832,920,021.81/28,172.70
  6. Step 6: Final answer
    x = 29,564.79

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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.