Home / 21,332.72-31,995.84-8,191.28

Finding the Fourth Proportional to 21,332.72, 31,995.84 and 8,191.28

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Solution

The fourth proportional to 21,332.72, 31,995.84 and 8,191.28 is: 12,285.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,332.72 : 31,995.84 = 8,191.28 : x
  2. Step 2: Convert to fraction form
    21,332.72/31,995.84 = 8,191.28/x
  3. Step 3: Cross multiply
    21,332.72x = 31,995.84 × 8,191.28
  4. Step 4: Simplify right side
    21,332.72x = 262,086,884.28
  5. Step 5: Solve for x
    x = 262,086,884.28/21,332.72
  6. Step 6: Final answer
    x = 12,285.68

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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.