Home / 13,511.83-18,643.62-7,542.55

Finding the Fourth Proportional to 13,511.83, 18,643.62 and 7,542.55

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Solution

The fourth proportional to 13,511.83, 18,643.62 and 7,542.55 is: 10,407.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,511.83 : 18,643.62 = 7,542.55 : x
  2. Step 2: Convert to fraction form
    13,511.83/18,643.62 = 7,542.55/x
  3. Step 3: Cross multiply
    13,511.83x = 18,643.62 × 7,542.55
  4. Step 4: Simplify right side
    13,511.83x = 140,620,436.03
  5. Step 5: Solve for x
    x = 140,620,436.03/13,511.83
  6. Step 6: Final answer
    x = 10,407.21

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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.