Home / 20,663.50-31,107.70-18,826.42

Finding the Fourth Proportional to 20,663.50, 31,107.70 and 18,826.42

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Solution

The fourth proportional to 20,663.50, 31,107.70 and 18,826.42 is: 28,342.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.50 : 31,107.70 = 18,826.42 : x
  2. Step 2: Convert to fraction form
    20,663.50/31,107.70 = 18,826.42/x
  3. Step 3: Cross multiply
    20,663.50x = 31,107.70 × 18,826.42
  4. Step 4: Simplify right side
    20,663.50x = 585,646,625.43
  5. Step 5: Solve for x
    x = 585,646,625.43/20,663.50
  6. Step 6: Final answer
    x = 28,342.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.