Home / 13,939.76-20,904.35-5,616.94

Finding the Fourth Proportional to 13,939.76, 20,904.35 and 5,616.94

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Solution

The fourth proportional to 13,939.76, 20,904.35 and 5,616.94 is: 8,423.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,939.76 : 20,904.35 = 5,616.94 : x
  2. Step 2: Convert to fraction form
    13,939.76/20,904.35 = 5,616.94/x
  3. Step 3: Cross multiply
    13,939.76x = 20,904.35 × 5,616.94
  4. Step 4: Simplify right side
    13,939.76x = 117,418,479.69
  5. Step 5: Solve for x
    x = 117,418,479.69/13,939.76
  6. Step 6: Final answer
    x = 8,423.28

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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.