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Finding the Fourth Proportional to 6,991.79, 10,487.59 and 2,831.76

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Solution

The fourth proportional to 6,991.79, 10,487.59 and 2,831.76 is: 4,247.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.79 : 10,487.59 = 2,831.76 : x
  2. Step 2: Convert to fraction form
    6,991.79/10,487.59 = 2,831.76/x
  3. Step 3: Cross multiply
    6,991.79x = 10,487.59 × 2,831.76
  4. Step 4: Simplify right side
    6,991.79x = 29,698,323.70
  5. Step 5: Solve for x
    x = 29,698,323.70/6,991.79
  6. Step 6: Final answer
    x = 4,247.60

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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.