Home / 13,129.50-18,113.31-8,655.33

Finding the Fourth Proportional to 13,129.50, 18,113.31 and 8,655.33

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Solution

The fourth proportional to 13,129.50, 18,113.31 and 8,655.33 is: 11,940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.50 : 18,113.31 = 8,655.33 : x
  2. Step 2: Convert to fraction form
    13,129.50/18,113.31 = 8,655.33/x
  3. Step 3: Cross multiply
    13,129.50x = 18,113.31 × 8,655.33
  4. Step 4: Simplify right side
    13,129.50x = 156,776,675.44
  5. Step 5: Solve for x
    x = 156,776,675.44/13,129.50
  6. Step 6: Final answer
    x = 11,940.80

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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.