Home / 31,690.93-43,754.12-20,364.79

Finding the Fourth Proportional to 31,690.93, 43,754.12 and 20,364.79

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Solution

The fourth proportional to 31,690.93, 43,754.12 and 20,364.79 is: 28,116.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.93 : 43,754.12 = 20,364.79 : x
  2. Step 2: Convert to fraction form
    31,690.93/43,754.12 = 20,364.79/x
  3. Step 3: Cross multiply
    31,690.93x = 43,754.12 × 20,364.79
  4. Step 4: Simplify right side
    31,690.93x = 891,043,465.43
  5. Step 5: Solve for x
    x = 891,043,465.43/31,690.93
  6. Step 6: Final answer
    x = 28,116.67

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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.