Home / 27,781.56-38,303.42-20,221.83

Finding the Fourth Proportional to 27,781.56, 38,303.42 and 20,221.83

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Solution

The fourth proportional to 27,781.56, 38,303.42 and 20,221.83 is: 27,880.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,781.56 : 38,303.42 = 20,221.83 : x
  2. Step 2: Convert to fraction form
    27,781.56/38,303.42 = 20,221.83/x
  3. Step 3: Cross multiply
    27,781.56x = 38,303.42 × 20,221.83
  4. Step 4: Simplify right side
    27,781.56x = 774,565,146.55
  5. Step 5: Solve for x
    x = 774,565,146.55/27,781.56
  6. Step 6: Final answer
    x = 27,880.55

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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.