Home / 20,487.18-28,270.52-11,411.86

Finding the Fourth Proportional to 20,487.18, 28,270.52 and 11,411.86

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Solution

The fourth proportional to 20,487.18, 28,270.52 and 11,411.86 is: 15,747.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.18 : 28,270.52 = 11,411.86 : x
  2. Step 2: Convert to fraction form
    20,487.18/28,270.52 = 11,411.86/x
  3. Step 3: Cross multiply
    20,487.18x = 28,270.52 × 11,411.86
  4. Step 4: Simplify right side
    20,487.18x = 322,619,216.37
  5. Step 5: Solve for x
    x = 322,619,216.37/20,487.18
  6. Step 6: Final answer
    x = 15,747.37

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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.