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Finding the Fourth Proportional to 5,605.80, 8,409.96 and 2,831.40

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Solution

The fourth proportional to 5,605.80, 8,409.96 and 2,831.40 is: 4,247.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,605.80 : 8,409.96 = 2,831.40 : x
  2. Step 2: Convert to fraction form
    5,605.80/8,409.96 = 2,831.40/x
  3. Step 3: Cross multiply
    5,605.80x = 8,409.96 × 2,831.40
  4. Step 4: Simplify right side
    5,605.80x = 23,811,960.74
  5. Step 5: Solve for x
    x = 23,811,960.74/5,605.80
  6. Step 6: Final answer
    x = 4,247.74

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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.