Home / 20,810.32-31,224.12-10,956.88

Finding the Fourth Proportional to 20,810.32, 31,224.12 and 10,956.88

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Solution

The fourth proportional to 20,810.32, 31,224.12 and 10,956.88 is: 16,439.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.32 : 31,224.12 = 10,956.88 : x
  2. Step 2: Convert to fraction form
    20,810.32/31,224.12 = 10,956.88/x
  3. Step 3: Cross multiply
    20,810.32x = 31,224.12 × 10,956.88
  4. Step 4: Simplify right side
    20,810.32x = 342,118,935.95
  5. Step 5: Solve for x
    x = 342,118,935.95/20,810.32
  6. Step 6: Final answer
    x = 16,439.87

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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.