Home / 20,827.90-31,221.78-7,673.08

Finding the Fourth Proportional to 20,827.90, 31,221.78 and 7,673.08

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Solution

The fourth proportional to 20,827.90, 31,221.78 and 7,673.08 is: 11,502.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.90 : 31,221.78 = 7,673.08 : x
  2. Step 2: Convert to fraction form
    20,827.90/31,221.78 = 7,673.08/x
  3. Step 3: Cross multiply
    20,827.90x = 31,221.78 × 7,673.08
  4. Step 4: Simplify right side
    20,827.90x = 239,567,215.68
  5. Step 5: Solve for x
    x = 239,567,215.68/20,827.90
  6. Step 6: Final answer
    x = 11,502.23

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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.