Home / 13,931.88-20,898.64-5,611.84

Finding the Fourth Proportional to 13,931.88, 20,898.64 and 5,611.84

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Solution

The fourth proportional to 13,931.88, 20,898.64 and 5,611.84 is: 8,418.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.88 : 20,898.64 = 5,611.84 : x
  2. Step 2: Convert to fraction form
    13,931.88/20,898.64 = 5,611.84/x
  3. Step 3: Cross multiply
    13,931.88x = 20,898.64 × 5,611.84
  4. Step 4: Simplify right side
    13,931.88x = 117,279,823.90
  5. Step 5: Solve for x
    x = 117,279,823.90/13,931.88
  6. Step 6: Final answer
    x = 8,418.09

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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.