Home / 30,102.82-45,129.56-11,372.20

Finding the Fourth Proportional to 30,102.82, 45,129.56 and 11,372.20

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Solution

The fourth proportional to 30,102.82, 45,129.56 and 11,372.20 is: 17,048.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,102.82 : 45,129.56 = 11,372.20 : x
  2. Step 2: Convert to fraction form
    30,102.82/45,129.56 = 11,372.20/x
  3. Step 3: Cross multiply
    30,102.82x = 45,129.56 × 11,372.20
  4. Step 4: Simplify right side
    30,102.82x = 513,222,212.55
  5. Step 5: Solve for x
    x = 513,222,212.55/30,102.82
  6. Step 6: Final answer
    x = 17,048.98

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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.