Home / 13,886.11-19,142.90-9,900.30

Finding the Fourth Proportional to 13,886.11, 19,142.90 and 9,900.30

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Solution

The fourth proportional to 13,886.11, 19,142.90 and 9,900.30 is: 13,648.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,886.11 : 19,142.90 = 9,900.30 : x
  2. Step 2: Convert to fraction form
    13,886.11/19,142.90 = 9,900.30/x
  3. Step 3: Cross multiply
    13,886.11x = 19,142.90 × 9,900.30
  4. Step 4: Simplify right side
    13,886.11x = 189,520,452.87
  5. Step 5: Solve for x
    x = 189,520,452.87/13,886.11
  6. Step 6: Final answer
    x = 13,648.20

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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.