Home / 13,985.11-20,977.67-13,129.75

Finding the Fourth Proportional to 13,985.11, 20,977.67 and 13,129.75

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Solution

The fourth proportional to 13,985.11, 20,977.67 and 13,129.75 is: 19,694.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.11 : 20,977.67 = 13,129.75 : x
  2. Step 2: Convert to fraction form
    13,985.11/20,977.67 = 13,129.75/x
  3. Step 3: Cross multiply
    13,985.11x = 20,977.67 × 13,129.75
  4. Step 4: Simplify right side
    13,985.11x = 275,431,444.59
  5. Step 5: Solve for x
    x = 275,431,444.59/13,985.11
  6. Step 6: Final answer
    x = 19,694.62

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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.