Home / 10,913.40-16,355.70-7,831.80

Finding the Fourth Proportional to 10,913.40, 16,355.70 and 7,831.80

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Solution

The fourth proportional to 10,913.40, 16,355.70 and 7,831.80 is: 11,737.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,913.40 : 16,355.70 = 7,831.80 : x
  2. Step 2: Convert to fraction form
    10,913.40/16,355.70 = 7,831.80/x
  3. Step 3: Cross multiply
    10,913.40x = 16,355.70 × 7,831.80
  4. Step 4: Simplify right side
    10,913.40x = 128,094,571.26
  5. Step 5: Solve for x
    x = 128,094,571.26/10,913.40
  6. Step 6: Final answer
    x = 11,737.37

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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.