Home / 13,987.94-20,981.97-5,668.12

Finding the Fourth Proportional to 13,987.94, 20,981.97 and 5,668.12

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Solution

The fourth proportional to 13,987.94, 20,981.97 and 5,668.12 is: 8,502.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.94 : 20,981.97 = 5,668.12 : x
  2. Step 2: Convert to fraction form
    13,987.94/20,981.97 = 5,668.12/x
  3. Step 3: Cross multiply
    13,987.94x = 20,981.97 × 5,668.12
  4. Step 4: Simplify right side
    13,987.94x = 118,928,323.80
  5. Step 5: Solve for x
    x = 118,928,323.80/13,987.94
  6. Step 6: Final answer
    x = 8,502.20

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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.