Home / 20,772.45-31,158.86-5,190.08

Finding the Fourth Proportional to 20,772.45, 31,158.86 and 5,190.08

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Solution

The fourth proportional to 20,772.45, 31,158.86 and 5,190.08 is: 7,785.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.45 : 31,158.86 = 5,190.08 : x
  2. Step 2: Convert to fraction form
    20,772.45/31,158.86 = 5,190.08/x
  3. Step 3: Cross multiply
    20,772.45x = 31,158.86 × 5,190.08
  4. Step 4: Simplify right side
    20,772.45x = 161,716,794.36
  5. Step 5: Solve for x
    x = 161,716,794.36/20,772.45
  6. Step 6: Final answer
    x = 7,785.16

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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.