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Finding the Fourth Proportional to 13,889.70, 20,835.63 and 4,029.12

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Solution

The fourth proportional to 13,889.70, 20,835.63 and 4,029.12 is: 6,043.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.70 : 20,835.63 = 4,029.12 : x
  2. Step 2: Convert to fraction form
    13,889.70/20,835.63 = 4,029.12/x
  3. Step 3: Cross multiply
    13,889.70x = 20,835.63 × 4,029.12
  4. Step 4: Simplify right side
    13,889.70x = 83,949,253.55
  5. Step 5: Solve for x
    x = 83,949,253.55/13,889.70
  6. Step 6: Final answer
    x = 6,043.99

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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.