Home / 13,120.49-18,117.60-11,250.61

Finding the Fourth Proportional to 13,120.49, 18,117.60 and 11,250.61

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Solution

The fourth proportional to 13,120.49, 18,117.60 and 11,250.61 is: 15,535.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.49 : 18,117.60 = 11,250.61 : x
  2. Step 2: Convert to fraction form
    13,120.49/18,117.60 = 11,250.61/x
  3. Step 3: Cross multiply
    13,120.49x = 18,117.60 × 11,250.61
  4. Step 4: Simplify right side
    13,120.49x = 203,834,051.74
  5. Step 5: Solve for x
    x = 203,834,051.74/13,120.49
  6. Step 6: Final answer
    x = 15,535.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.