Home / 20,703.39-31,029.05-11,215.34

Finding the Fourth Proportional to 20,703.39, 31,029.05 and 11,215.34

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Solution

The fourth proportional to 20,703.39, 31,029.05 and 11,215.34 is: 16,808.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.39 : 31,029.05 = 11,215.34 : x
  2. Step 2: Convert to fraction form
    20,703.39/31,029.05 = 11,215.34/x
  3. Step 3: Cross multiply
    20,703.39x = 31,029.05 × 11,215.34
  4. Step 4: Simplify right side
    20,703.39x = 348,001,451.24
  5. Step 5: Solve for x
    x = 348,001,451.24/20,703.39
  6. Step 6: Final answer
    x = 16,808.91

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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.