Home / 20,661.52-30,991.56-6,621.34

Finding the Fourth Proportional to 20,661.52, 30,991.56 and 6,621.34

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Solution

The fourth proportional to 20,661.52, 30,991.56 and 6,621.34 is: 9,931.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.52 : 30,991.56 = 6,621.34 : x
  2. Step 2: Convert to fraction form
    20,661.52/30,991.56 = 6,621.34/x
  3. Step 3: Cross multiply
    20,661.52x = 30,991.56 × 6,621.34
  4. Step 4: Simplify right side
    20,661.52x = 205,205,655.89
  5. Step 5: Solve for x
    x = 205,205,655.89/20,661.52
  6. Step 6: Final answer
    x = 9,931.78

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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.