Home / 20,955.28-31,443.60-13,940.23

Finding the Fourth Proportional to 20,955.28, 31,443.60 and 13,940.23

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Solution

The fourth proportional to 20,955.28, 31,443.60 and 13,940.23 is: 20,917.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.28 : 31,443.60 = 13,940.23 : x
  2. Step 2: Convert to fraction form
    20,955.28/31,443.60 = 13,940.23/x
  3. Step 3: Cross multiply
    20,955.28x = 31,443.60 × 13,940.23
  4. Step 4: Simplify right side
    20,955.28x = 438,331,016.03
  5. Step 5: Solve for x
    x = 438,331,016.03/20,955.28
  6. Step 6: Final answer
    x = 20,917.45

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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.