Home / 31,570.88-43,528.41-20,221.71

Finding the Fourth Proportional to 31,570.88, 43,528.41 and 20,221.71

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Solution

The fourth proportional to 31,570.88, 43,528.41 and 20,221.71 is: 27,880.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,570.88 : 43,528.41 = 20,221.71 : x
  2. Step 2: Convert to fraction form
    31,570.88/43,528.41 = 20,221.71/x
  3. Step 3: Cross multiply
    31,570.88x = 43,528.41 × 20,221.71
  4. Step 4: Simplify right side
    31,570.88x = 880,218,883.78
  5. Step 5: Solve for x
    x = 880,218,883.78/31,570.88
  6. Step 6: Final answer
    x = 27,880.72

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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.