Home / 21,177.32-31,760.84-7,133.72

Finding the Fourth Proportional to 21,177.32, 31,760.84 and 7,133.72

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Solution

The fourth proportional to 21,177.32, 31,760.84 and 7,133.72 is: 10,698.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.32 : 31,760.84 = 7,133.72 : x
  2. Step 2: Convert to fraction form
    21,177.32/31,760.84 = 7,133.72/x
  3. Step 3: Cross multiply
    21,177.32x = 31,760.84 × 7,133.72
  4. Step 4: Simplify right side
    21,177.32x = 226,572,745.05
  5. Step 5: Solve for x
    x = 226,572,745.05/21,177.32
  6. Step 6: Final answer
    x = 10,698.84

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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.