Home / 18,981.72-28,456.37-13,417.56

Finding the Fourth Proportional to 18,981.72, 28,456.37 and 13,417.56

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Solution

The fourth proportional to 18,981.72, 28,456.37 and 13,417.56 is: 20,114.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.72 : 28,456.37 = 13,417.56 : x
  2. Step 2: Convert to fraction form
    18,981.72/28,456.37 = 13,417.56/x
  3. Step 3: Cross multiply
    18,981.72x = 28,456.37 × 13,417.56
  4. Step 4: Simplify right side
    18,981.72x = 381,815,051.86
  5. Step 5: Solve for x
    x = 381,815,051.86/18,981.72
  6. Step 6: Final answer
    x = 20,114.88

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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.