Home / 20,890.92-31,345.56-7,740.48

Finding the Fourth Proportional to 20,890.92, 31,345.56 and 7,740.48

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Solution

The fourth proportional to 20,890.92, 31,345.56 and 7,740.48 is: 11,614.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.92 : 31,345.56 = 7,740.48 : x
  2. Step 2: Convert to fraction form
    20,890.92/31,345.56 = 7,740.48/x
  3. Step 3: Cross multiply
    20,890.92x = 31,345.56 × 7,740.48
  4. Step 4: Simplify right side
    20,890.92x = 242,629,680.27
  5. Step 5: Solve for x
    x = 242,629,680.27/20,890.92
  6. Step 6: Final answer
    x = 11,614.12

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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.