Home / 39,722.19-54,814.45-21,814.31

Finding the Fourth Proportional to 39,722.19, 54,814.45 and 21,814.31

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Solution

The fourth proportional to 39,722.19, 54,814.45 and 21,814.31 is: 30,102.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,722.19 : 54,814.45 = 21,814.31 : x
  2. Step 2: Convert to fraction form
    39,722.19/54,814.45 = 21,814.31/x
  3. Step 3: Cross multiply
    39,722.19x = 54,814.45 × 21,814.31
  4. Step 4: Simplify right side
    39,722.19x = 1,195,739,404.78
  5. Step 5: Solve for x
    x = 1,195,739,404.78/39,722.19
  6. Step 6: Final answer
    x = 30,102.55

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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.