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Finding the Fourth Proportional to 13,889.88, 20,836.44 and 5,572.80

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Solution

The fourth proportional to 13,889.88, 20,836.44 and 5,572.80 is: 8,359.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.88 : 20,836.44 = 5,572.80 : x
  2. Step 2: Convert to fraction form
    13,889.88/20,836.44 = 5,572.80/x
  3. Step 3: Cross multiply
    13,889.88x = 20,836.44 × 5,572.80
  4. Step 4: Simplify right side
    13,889.88x = 116,117,312.83
  5. Step 5: Solve for x
    x = 116,117,312.83/13,889.88
  6. Step 6: Final answer
    x = 8,359.85

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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.