Home / 7,831.56-11,747.28-1,988.22

Finding the Fourth Proportional to 7,831.56, 11,747.28 and 1,988.22

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Solution

The fourth proportional to 7,831.56, 11,747.28 and 1,988.22 is: 2,982.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,831.56 : 11,747.28 = 1,988.22 : x
  2. Step 2: Convert to fraction form
    7,831.56/11,747.28 = 1,988.22/x
  3. Step 3: Cross multiply
    7,831.56x = 11,747.28 × 1,988.22
  4. Step 4: Simplify right side
    7,831.56x = 23,356,177.04
  5. Step 5: Solve for x
    x = 23,356,177.04/7,831.56
  6. Step 6: Final answer
    x = 2,982.31

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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.