Home / 31,856.32-43,941.36-20,540.32

Finding the Fourth Proportional to 31,856.32, 43,941.36 and 20,540.32

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Solution

The fourth proportional to 31,856.32, 43,941.36 and 20,540.32 is: 28,332.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,856.32 : 43,941.36 = 20,540.32 : x
  2. Step 2: Convert to fraction form
    31,856.32/43,941.36 = 20,540.32/x
  3. Step 3: Cross multiply
    31,856.32x = 43,941.36 × 20,540.32
  4. Step 4: Simplify right side
    31,856.32x = 902,569,595.64
  5. Step 5: Solve for x
    x = 902,569,595.64/31,856.32
  6. Step 6: Final answer
    x = 28,332.51

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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.