Home / 20,943.18-28,901.26-11,511.54

Finding the Fourth Proportional to 20,943.18, 28,901.26 and 11,511.54

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Solution

The fourth proportional to 20,943.18, 28,901.26 and 11,511.54 is: 15,885.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,943.18 : 28,901.26 = 11,511.54 : x
  2. Step 2: Convert to fraction form
    20,943.18/28,901.26 = 11,511.54/x
  3. Step 3: Cross multiply
    20,943.18x = 28,901.26 × 11,511.54
  4. Step 4: Simplify right side
    20,943.18x = 332,698,010.54
  5. Step 5: Solve for x
    x = 332,698,010.54/20,943.18
  6. Step 6: Final answer
    x = 15,885.74

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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.