Home / 20,955.99-31,454.64-15,393.72

Finding the Fourth Proportional to 20,955.99, 31,454.64 and 15,393.72

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Solution

The fourth proportional to 20,955.99, 31,454.64 and 15,393.72 is: 23,105.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.99 : 31,454.64 = 15,393.72 : x
  2. Step 2: Convert to fraction form
    20,955.99/31,454.64 = 15,393.72/x
  3. Step 3: Cross multiply
    20,955.99x = 31,454.64 × 15,393.72
  4. Step 4: Simplify right side
    20,955.99x = 484,203,920.86
  5. Step 5: Solve for x
    x = 484,203,920.86/20,955.99
  6. Step 6: Final answer
    x = 23,105.75

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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.