Home / 39,876.85-55,033.17-21,975.06

Finding the Fourth Proportional to 39,876.85, 55,033.17 and 21,975.06

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Solution

The fourth proportional to 39,876.85, 55,033.17 and 21,975.06 is: 30,327.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,876.85 : 55,033.17 = 21,975.06 : x
  2. Step 2: Convert to fraction form
    39,876.85/55,033.17 = 21,975.06/x
  3. Step 3: Cross multiply
    39,876.85x = 55,033.17 × 21,975.06
  4. Step 4: Simplify right side
    39,876.85x = 1,209,357,212.74
  5. Step 5: Solve for x
    x = 1,209,357,212.74/39,876.85
  6. Step 6: Final answer
    x = 30,327.30

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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.