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Finding the Third Proportional to 5,121.56 and 7,831.13

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Solution

The third proportional to 5,121.56 and 7,831.13 is: 11,974.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.56 : 7,831.13 = 7,831.13 : x
  2. Step 2: Convert to fraction form
    5,121.56/7,831.13 = 7,831.13/x
  3. Step 3: Cross multiply
    5,121.56x = 7,831.13 × 7,831.13
  4. Step 4: Simplify right side
    5,121.56x = 61,326,518.77
  5. Step 5: Solve for x
    x = 61,326,518.77/5,121.56
  6. Step 6: Final answer
    x = 11,974.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.