Home / 20,621.79-28,456.52-11,667.24

Finding the Fourth Proportional to 20,621.79, 28,456.52 and 11,667.24

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Solution

The fourth proportional to 20,621.79, 28,456.52 and 11,667.24 is: 16,099.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.79 : 28,456.52 = 11,667.24 : x
  2. Step 2: Convert to fraction form
    20,621.79/28,456.52 = 11,667.24/x
  3. Step 3: Cross multiply
    20,621.79x = 28,456.52 × 11,667.24
  4. Step 4: Simplify right side
    20,621.79x = 332,008,990.07
  5. Step 5: Solve for x
    x = 332,008,990.07/20,621.79
  6. Step 6: Final answer
    x = 16,099.91

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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.