Home / 13,800.86-20,695.05-3,937.79

Finding the Fourth Proportional to 13,800.86, 20,695.05 and 3,937.79

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Solution

The fourth proportional to 13,800.86, 20,695.05 and 3,937.79 is: 5,904.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,800.86 : 20,695.05 = 3,937.79 : x
  2. Step 2: Convert to fraction form
    13,800.86/20,695.05 = 3,937.79/x
  3. Step 3: Cross multiply
    13,800.86x = 20,695.05 × 3,937.79
  4. Step 4: Simplify right side
    13,800.86x = 81,492,760.94
  5. Step 5: Solve for x
    x = 81,492,760.94/13,800.86
  6. Step 6: Final answer
    x = 5,904.90

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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.