Home / 39,789.74-54,911.04-21,885.91

Finding the Fourth Proportional to 39,789.74, 54,911.04 and 21,885.91

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Solution

The fourth proportional to 39,789.74, 54,911.04 and 21,885.91 is: 30,203.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,789.74 : 54,911.04 = 21,885.91 : x
  2. Step 2: Convert to fraction form
    39,789.74/54,911.04 = 21,885.91/x
  3. Step 3: Cross multiply
    39,789.74x = 54,911.04 × 21,885.91
  4. Step 4: Simplify right side
    39,789.74x = 1,201,778,079.45
  5. Step 5: Solve for x
    x = 1,201,778,079.45/39,789.74
  6. Step 6: Final answer
    x = 30,203.22

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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.