Home / 21,023.70-28,996.29-13,470.73

Finding the Fourth Proportional to 21,023.70, 28,996.29 and 13,470.73

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Solution

The fourth proportional to 21,023.70, 28,996.29 and 13,470.73 is: 18,579.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,023.70 : 28,996.29 = 13,470.73 : x
  2. Step 2: Convert to fraction form
    21,023.70/28,996.29 = 13,470.73/x
  3. Step 3: Cross multiply
    21,023.70x = 28,996.29 × 13,470.73
  4. Step 4: Simplify right side
    21,023.70x = 390,601,193.59
  5. Step 5: Solve for x
    x = 390,601,193.59/21,023.70
  6. Step 6: Final answer
    x = 18,579.09

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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.