Home / 20,733.12-31,115.16-11,956.32

Finding the Fourth Proportional to 20,733.12, 31,115.16 and 11,956.32

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Solution

The fourth proportional to 20,733.12, 31,115.16 and 11,956.32 is: 17,943.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,733.12 : 31,115.16 = 11,956.32 : x
  2. Step 2: Convert to fraction form
    20,733.12/31,115.16 = 11,956.32/x
  3. Step 3: Cross multiply
    20,733.12x = 31,115.16 × 11,956.32
  4. Step 4: Simplify right side
    20,733.12x = 372,022,809.81
  5. Step 5: Solve for x
    x = 372,022,809.81/20,733.12
  6. Step 6: Final answer
    x = 17,943.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.