Home / 45,189.10-67,778.47-11,911.78

Finding the Fourth Proportional to 45,189.10, 67,778.47 and 11,911.78

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Solution

The fourth proportional to 45,189.10, 67,778.47 and 11,911.78 is: 17,866.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,189.10 : 67,778.47 = 11,911.78 : x
  2. Step 2: Convert to fraction form
    45,189.10/67,778.47 = 11,911.78/x
  3. Step 3: Cross multiply
    45,189.10x = 67,778.47 × 11,911.78
  4. Step 4: Simplify right side
    45,189.10x = 807,362,223.38
  5. Step 5: Solve for x
    x = 807,362,223.38/45,189.10
  6. Step 6: Final answer
    x = 17,866.30

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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.