Home / 13,581.12-20,238.32-13,135.20

Finding the Fourth Proportional to 13,581.12, 20,238.32 and 13,135.20

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Solution

The fourth proportional to 13,581.12, 20,238.32 and 13,135.20 is: 19,573.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.12 : 20,238.32 = 13,135.20 : x
  2. Step 2: Convert to fraction form
    13,581.12/20,238.32 = 13,135.20/x
  3. Step 3: Cross multiply
    13,581.12x = 20,238.32 × 13,135.20
  4. Step 4: Simplify right side
    13,581.12x = 265,834,380.86
  5. Step 5: Solve for x
    x = 265,834,380.86/13,581.12
  6. Step 6: Final answer
    x = 19,573.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.