Home / 13,110.55-18,092.60-7,142.20

Finding the Fourth Proportional to 13,110.55, 18,092.60 and 7,142.20

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Solution

The fourth proportional to 13,110.55, 18,092.60 and 7,142.20 is: 9,856.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,110.55 : 18,092.60 = 7,142.20 : x
  2. Step 2: Convert to fraction form
    13,110.55/18,092.60 = 7,142.20/x
  3. Step 3: Cross multiply
    13,110.55x = 18,092.60 × 7,142.20
  4. Step 4: Simplify right side
    13,110.55x = 129,220,967.72
  5. Step 5: Solve for x
    x = 129,220,967.72/13,110.55
  6. Step 6: Final answer
    x = 9,856.26

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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.