Home / 13,808.20-19,059.60-13,102.78

Finding the Fourth Proportional to 13,808.20, 19,059.60 and 13,102.78

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Solution

The fourth proportional to 13,808.20, 19,059.60 and 13,102.78 is: 18,085.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,808.20 : 19,059.60 = 13,102.78 : x
  2. Step 2: Convert to fraction form
    13,808.20/19,059.60 = 13,102.78/x
  3. Step 3: Cross multiply
    13,808.20x = 19,059.60 × 13,102.78
  4. Step 4: Simplify right side
    13,808.20x = 249,733,745.69
  5. Step 5: Solve for x
    x = 249,733,745.69/13,808.20
  6. Step 6: Final answer
    x = 18,085.90

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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.