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Finding the Fourth Proportional to 13,808.70, 19,060.20 and 13,103.28

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Solution

The fourth proportional to 13,808.70, 19,060.20 and 13,103.28 is: 18,086.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.70 : 19,060.20 = 13,103.28 : x
  2. Step 2: Convert to fraction form
    13,808.70/19,060.20 = 13,103.28/x
  3. Step 3: Cross multiply
    13,808.70x = 19,060.20 × 13,103.28
  4. Step 4: Simplify right side
    13,808.70x = 249,751,137.46
  5. Step 5: Solve for x
    x = 249,751,137.46/13,808.70
  6. Step 6: Final answer
    x = 18,086.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.