Home / 20,785.68-31,178.52-6,935.76

Finding the Fourth Proportional to 20,785.68, 31,178.52 and 6,935.76

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Solution

The fourth proportional to 20,785.68, 31,178.52 and 6,935.76 is: 10,403.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.68 : 31,178.52 = 6,935.76 : x
  2. Step 2: Convert to fraction form
    20,785.68/31,178.52 = 6,935.76/x
  3. Step 3: Cross multiply
    20,785.68x = 31,178.52 × 6,935.76
  4. Step 4: Simplify right side
    20,785.68x = 216,246,731.88
  5. Step 5: Solve for x
    x = 216,246,731.88/20,785.68
  6. Step 6: Final answer
    x = 10,403.64

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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.