Home / 13,722.78-20,534.94-11,880.24

Finding the Fourth Proportional to 13,722.78, 20,534.94 and 11,880.24

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Solution

The fourth proportional to 13,722.78, 20,534.94 and 11,880.24 is: 17,777.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.78 : 20,534.94 = 11,880.24 : x
  2. Step 2: Convert to fraction form
    13,722.78/20,534.94 = 11,880.24/x
  3. Step 3: Cross multiply
    13,722.78x = 20,534.94 × 11,880.24
  4. Step 4: Simplify right side
    13,722.78x = 243,960,015.59
  5. Step 5: Solve for x
    x = 243,960,015.59/13,722.78
  6. Step 6: Final answer
    x = 17,777.74

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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.