Home / 20,678.11-31,016.68-6,637.57

Finding the Fourth Proportional to 20,678.11, 31,016.68 and 6,637.57

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Solution

The fourth proportional to 20,678.11, 31,016.68 and 6,637.57 is: 9,956.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.11 : 31,016.68 = 6,637.57 : x
  2. Step 2: Convert to fraction form
    20,678.11/31,016.68 = 6,637.57/x
  3. Step 3: Cross multiply
    20,678.11x = 31,016.68 × 6,637.57
  4. Step 4: Simplify right side
    20,678.11x = 205,875,212.99
  5. Step 5: Solve for x
    x = 205,875,212.99/20,678.11
  6. Step 6: Final answer
    x = 9,956.19

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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.