Home / 13,983.20-20,967.60-5,213.60

Finding the Fourth Proportional to 13,983.20, 20,967.60 and 5,213.60

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Solution

The fourth proportional to 13,983.20, 20,967.60 and 5,213.60 is: 7,817.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,983.20 : 20,967.60 = 5,213.60 : x
  2. Step 2: Convert to fraction form
    13,983.20/20,967.60 = 5,213.60/x
  3. Step 3: Cross multiply
    13,983.20x = 20,967.60 × 5,213.60
  4. Step 4: Simplify right side
    13,983.20x = 109,316,679.36
  5. Step 5: Solve for x
    x = 109,316,679.36/13,983.20
  6. Step 6: Final answer
    x = 7,817.72

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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.