Home / 20,925.69-31,388.54-13,139.97

Finding the Fourth Proportional to 20,925.69, 31,388.54 and 13,139.97

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Solution

The fourth proportional to 20,925.69, 31,388.54 and 13,139.97 is: 19,709.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.69 : 31,388.54 = 13,139.97 : x
  2. Step 2: Convert to fraction form
    20,925.69/31,388.54 = 13,139.97/x
  3. Step 3: Cross multiply
    20,925.69x = 31,388.54 × 13,139.97
  4. Step 4: Simplify right side
    20,925.69x = 412,444,408.24
  5. Step 5: Solve for x
    x = 412,444,408.24/20,925.69
  6. Step 6: Final answer
    x = 19,709.96

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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.