Home / 39,877.85-55,034.55-21,976.06

Finding the Fourth Proportional to 39,877.85, 55,034.55 and 21,976.06

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Solution

The fourth proportional to 39,877.85, 55,034.55 and 21,976.06 is: 30,328.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,877.85 : 55,034.55 = 21,976.06 : x
  2. Step 2: Convert to fraction form
    39,877.85/55,034.55 = 21,976.06/x
  3. Step 3: Cross multiply
    39,877.85x = 55,034.55 × 21,976.06
  4. Step 4: Simplify right side
    39,877.85x = 1,209,442,572.87
  5. Step 5: Solve for x
    x = 1,209,442,572.87/39,877.85
  6. Step 6: Final answer
    x = 30,328.68

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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.