Home / 21,027.63-31,478.43-20,279.93

Finding the Fourth Proportional to 21,027.63, 31,478.43 and 20,279.93

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Solution

The fourth proportional to 21,027.63, 31,478.43 and 20,279.93 is: 30,359.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.63 : 31,478.43 = 20,279.93 : x
  2. Step 2: Convert to fraction form
    21,027.63/31,478.43 = 20,279.93/x
  3. Step 3: Cross multiply
    21,027.63x = 31,478.43 × 20,279.93
  4. Step 4: Simplify right side
    21,027.63x = 638,380,356.91
  5. Step 5: Solve for x
    x = 638,380,356.91/21,027.63
  6. Step 6: Final answer
    x = 30,359.12

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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.