Home / 20,955.88-31,414.64-19,129.72

Finding the Fourth Proportional to 20,955.88, 31,414.64 and 19,129.72

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Solution

The fourth proportional to 20,955.88, 31,414.64 and 19,129.72 is: 28,677.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.88 : 31,414.64 = 19,129.72 : x
  2. Step 2: Convert to fraction form
    20,955.88/31,414.64 = 19,129.72/x
  3. Step 3: Cross multiply
    20,955.88x = 31,414.64 × 19,129.72
  4. Step 4: Simplify right side
    20,955.88x = 600,953,267.10
  5. Step 5: Solve for x
    x = 600,953,267.10/20,955.88
  6. Step 6: Final answer
    x = 28,677.07

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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.