Home / 31,408.14-43,345.90-21,358.88

Finding the Fourth Proportional to 31,408.14, 43,345.90 and 21,358.88

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Solution

The fourth proportional to 31,408.14, 43,345.90 and 21,358.88 is: 29,477.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,408.14 : 43,345.90 = 21,358.88 : x
  2. Step 2: Convert to fraction form
    31,408.14/43,345.90 = 21,358.88/x
  3. Step 3: Cross multiply
    31,408.14x = 43,345.90 × 21,358.88
  4. Step 4: Simplify right side
    31,408.14x = 925,819,876.59
  5. Step 5: Solve for x
    x = 925,819,876.59/31,408.14
  6. Step 6: Final answer
    x = 29,477.07

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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.