Home / 13,511.80-20,240.70-11,888.20

Finding the Fourth Proportional to 13,511.80, 20,240.70 and 11,888.20

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Solution

The fourth proportional to 13,511.80, 20,240.70 and 11,888.20 is: 17,808.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.80 : 20,240.70 = 11,888.20 : x
  2. Step 2: Convert to fraction form
    13,511.80/20,240.70 = 11,888.20/x
  3. Step 3: Cross multiply
    13,511.80x = 20,240.70 × 11,888.20
  4. Step 4: Simplify right side
    13,511.80x = 240,625,489.74
  5. Step 5: Solve for x
    x = 240,625,489.74/13,511.80
  6. Step 6: Final answer
    x = 17,808.54

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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.