Home / 21,273.28-31,921.60-10,885.12

Finding the Fourth Proportional to 21,273.28, 31,921.60 and 10,885.12

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Solution

The fourth proportional to 21,273.28, 31,921.60 and 10,885.12 is: 16,333.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.28 : 31,921.60 = 10,885.12 : x
  2. Step 2: Convert to fraction form
    21,273.28/31,921.60 = 10,885.12/x
  3. Step 3: Cross multiply
    21,273.28x = 31,921.60 × 10,885.12
  4. Step 4: Simplify right side
    21,273.28x = 347,470,446.59
  5. Step 5: Solve for x
    x = 347,470,446.59/21,273.28
  6. Step 6: Final answer
    x = 16,333.66

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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.