Home / 13,839.86-20,711.10-11,915.30

Finding the Fourth Proportional to 13,839.86, 20,711.10 and 11,915.30

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Solution

The fourth proportional to 13,839.86, 20,711.10 and 11,915.30 is: 17,831.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.86 : 20,711.10 = 11,915.30 : x
  2. Step 2: Convert to fraction form
    13,839.86/20,711.10 = 11,915.30/x
  3. Step 3: Cross multiply
    13,839.86x = 20,711.10 × 11,915.30
  4. Step 4: Simplify right side
    13,839.86x = 246,778,969.83
  5. Step 5: Solve for x
    x = 246,778,969.83/13,839.86
  6. Step 6: Final answer
    x = 17,831.03

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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.