Home / 13,311.57-19,933.20-12,917.40

Finding the Fourth Proportional to 13,311.57, 19,933.20 and 12,917.40

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Solution

The fourth proportional to 13,311.57, 19,933.20 and 12,917.40 is: 19,342.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,311.57 : 19,933.20 = 12,917.40 : x
  2. Step 2: Convert to fraction form
    13,311.57/19,933.20 = 12,917.40/x
  3. Step 3: Cross multiply
    13,311.57x = 19,933.20 × 12,917.40
  4. Step 4: Simplify right side
    13,311.57x = 257,485,117.68
  5. Step 5: Solve for x
    x = 257,485,117.68/13,311.57
  6. Step 6: Final answer
    x = 19,342.96

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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.