Home / 21,027.13-31,477.68-20,279.43

Finding the Fourth Proportional to 21,027.13, 31,477.68 and 20,279.43

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Solution

The fourth proportional to 21,027.13, 31,477.68 and 20,279.43 is: 30,358.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,027.13 : 31,477.68 = 20,279.43 : x
  2. Step 2: Convert to fraction form
    21,027.13/31,477.68 = 20,279.43/x
  3. Step 3: Cross multiply
    21,027.13x = 31,477.68 × 20,279.43
  4. Step 4: Simplify right side
    21,027.13x = 638,349,408.12
  5. Step 5: Solve for x
    x = 638,349,408.12/21,027.13
  6. Step 6: Final answer
    x = 30,358.37

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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.