Home / 13,656.87-20,455.34-11,290.05

Finding the Fourth Proportional to 13,656.87, 20,455.34 and 11,290.05

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Solution

The fourth proportional to 13,656.87, 20,455.34 and 11,290.05 is: 16,910.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.87 : 20,455.34 = 11,290.05 : x
  2. Step 2: Convert to fraction form
    13,656.87/20,455.34 = 11,290.05/x
  3. Step 3: Cross multiply
    13,656.87x = 20,455.34 × 11,290.05
  4. Step 4: Simplify right side
    13,656.87x = 230,941,754.92
  5. Step 5: Solve for x
    x = 230,941,754.92/13,656.87
  6. Step 6: Final answer
    x = 16,910.30

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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.