Home / 39,967.85-55,155.74-21,818.59

Finding the Fourth Proportional to 39,967.85, 55,155.74 and 21,818.59

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Solution

The fourth proportional to 39,967.85, 55,155.74 and 21,818.59 is: 30,109.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,967.85 : 55,155.74 = 21,818.59 : x
  2. Step 2: Convert to fraction form
    39,967.85/55,155.74 = 21,818.59/x
  3. Step 3: Cross multiply
    39,967.85x = 55,155.74 × 21,818.59
  4. Step 4: Simplify right side
    39,967.85x = 1,203,420,230.22
  5. Step 5: Solve for x
    x = 1,203,420,230.22/39,967.85
  6. Step 6: Final answer
    x = 30,109.70

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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.