Home / 13,987.20-20,962.17-5,213.28

Finding the Fourth Proportional to 13,987.20, 20,962.17 and 5,213.28

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Solution

The fourth proportional to 13,987.20, 20,962.17 and 5,213.28 is: 7,812.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.20 : 20,962.17 = 5,213.28 : x
  2. Step 2: Convert to fraction form
    13,987.20/20,962.17 = 5,213.28/x
  3. Step 3: Cross multiply
    13,987.20x = 20,962.17 × 5,213.28
  4. Step 4: Simplify right side
    13,987.20x = 109,281,661.62
  5. Step 5: Solve for x
    x = 109,281,661.62/13,987.20
  6. Step 6: Final answer
    x = 7,812.98

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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.