Home / 20,785.53-31,178.34-5,203.20

Finding the Fourth Proportional to 20,785.53, 31,178.34 and 5,203.20

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Solution

The fourth proportional to 20,785.53, 31,178.34 and 5,203.20 is: 7,804.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,785.53 : 31,178.34 = 5,203.20 : x
  2. Step 2: Convert to fraction form
    20,785.53/31,178.34 = 5,203.20/x
  3. Step 3: Cross multiply
    20,785.53x = 31,178.34 × 5,203.20
  4. Step 4: Simplify right side
    20,785.53x = 162,227,138.69
  5. Step 5: Solve for x
    x = 162,227,138.69/20,785.53
  6. Step 6: Final answer
    x = 7,804.81

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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.