Home / 13,313.57-19,936.20-12,919.40

Finding the Fourth Proportional to 13,313.57, 19,936.20 and 12,919.40

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Solution

The fourth proportional to 13,313.57, 19,936.20 and 12,919.40 is: 19,345.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,313.57 : 19,936.20 = 12,919.40 : x
  2. Step 2: Convert to fraction form
    13,313.57/19,936.20 = 12,919.40/x
  3. Step 3: Cross multiply
    13,313.57x = 19,936.20 × 12,919.40
  4. Step 4: Simplify right side
    13,313.57x = 257,563,742.28
  5. Step 5: Solve for x
    x = 257,563,742.28/13,313.57
  6. Step 6: Final answer
    x = 19,345.96

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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.