Home / 5,220.81-7,831.53-1,889.79

Finding the Fourth Proportional to 5,220.81, 7,831.53 and 1,889.79

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Solution

The fourth proportional to 5,220.81, 7,831.53 and 1,889.79 is: 2,834.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.81 : 7,831.53 = 1,889.79 : x
  2. Step 2: Convert to fraction form
    5,220.81/7,831.53 = 1,889.79/x
  3. Step 3: Cross multiply
    5,220.81x = 7,831.53 × 1,889.79
  4. Step 4: Simplify right side
    5,220.81x = 14,799,947.08
  5. Step 5: Solve for x
    x = 14,799,947.08/5,220.81
  6. Step 6: Final answer
    x = 2,834.80

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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.