Home / 21,220.28-31,844.24-8,072.76

Finding the Fourth Proportional to 21,220.28, 31,844.24 and 8,072.76

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Solution

The fourth proportional to 21,220.28, 31,844.24 and 8,072.76 is: 12,114.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.28 : 31,844.24 = 8,072.76 : x
  2. Step 2: Convert to fraction form
    21,220.28/31,844.24 = 8,072.76/x
  3. Step 3: Cross multiply
    21,220.28x = 31,844.24 × 8,072.76
  4. Step 4: Simplify right side
    21,220.28x = 257,071,016.23
  5. Step 5: Solve for x
    x = 257,071,016.23/21,220.28
  6. Step 6: Final answer
    x = 12,114.40

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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.