Home / 20,220.72-27,904.80-11,146.41

Finding the Fourth Proportional to 20,220.72, 27,904.80 and 11,146.41

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Solution

The fourth proportional to 20,220.72, 27,904.80 and 11,146.41 is: 15,382.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.72 : 27,904.80 = 11,146.41 : x
  2. Step 2: Convert to fraction form
    20,220.72/27,904.80 = 11,146.41/x
  3. Step 3: Cross multiply
    20,220.72x = 27,904.80 × 11,146.41
  4. Step 4: Simplify right side
    20,220.72x = 311,038,237.13
  5. Step 5: Solve for x
    x = 311,038,237.13/20,220.72
  6. Step 6: Final answer
    x = 15,382.15

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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.