Home / 31,319.94-43,223.50-20,690.94

Finding the Fourth Proportional to 31,319.94, 43,223.50 and 20,690.94

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Solution

The fourth proportional to 31,319.94, 43,223.50 and 20,690.94 is: 28,554.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,319.94 : 43,223.50 = 20,690.94 : x
  2. Step 2: Convert to fraction form
    31,319.94/43,223.50 = 20,690.94/x
  3. Step 3: Cross multiply
    31,319.94x = 43,223.50 × 20,690.94
  4. Step 4: Simplify right side
    31,319.94x = 894,334,845.09
  5. Step 5: Solve for x
    x = 894,334,845.09/31,319.94
  6. Step 6: Final answer
    x = 28,554.81

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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.