Home / 13,976.85-20,966.64-5,209.71

Finding the Fourth Proportional to 13,976.85, 20,966.64 and 5,209.71

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Solution

The fourth proportional to 13,976.85, 20,966.64 and 5,209.71 is: 7,815.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,976.85 : 20,966.64 = 5,209.71 : x
  2. Step 2: Convert to fraction form
    13,976.85/20,966.64 = 5,209.71/x
  3. Step 3: Cross multiply
    13,976.85x = 20,966.64 × 5,209.71
  4. Step 4: Simplify right side
    13,976.85x = 109,230,114.07
  5. Step 5: Solve for x
    x = 109,230,114.07/13,976.85
  6. Step 6: Final answer
    x = 7,815.07

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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.