Home / 20,785.68-31,178.58-5,203.29

Finding the Fourth Proportional to 20,785.68, 31,178.58 and 5,203.29

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Solution

The fourth proportional to 20,785.68, 31,178.58 and 5,203.29 is: 7,804.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.68 : 31,178.58 = 5,203.29 : x
  2. Step 2: Convert to fraction form
    20,785.68/31,178.58 = 5,203.29/x
  3. Step 3: Cross multiply
    20,785.68x = 31,178.58 × 5,203.29
  4. Step 4: Simplify right side
    20,785.68x = 162,231,193.53
  5. Step 5: Solve for x
    x = 162,231,193.53/20,785.68
  6. Step 6: Final answer
    x = 7,804.95

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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.