Home / 30,331.78-45,496.10-11,620.78

Finding the Fourth Proportional to 30,331.78, 45,496.10 and 11,620.78

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Solution

The fourth proportional to 30,331.78, 45,496.10 and 11,620.78 is: 17,430.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,331.78 : 45,496.10 = 11,620.78 : x
  2. Step 2: Convert to fraction form
    30,331.78/45,496.10 = 11,620.78/x
  3. Step 3: Cross multiply
    30,331.78x = 45,496.10 × 11,620.78
  4. Step 4: Simplify right side
    30,331.78x = 528,700,168.96
  5. Step 5: Solve for x
    x = 528,700,168.96/30,331.78
  6. Step 6: Final answer
    x = 17,430.57

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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.