Home / 13,621.77-20,404.31-8,666.87

Finding the Fourth Proportional to 13,621.77, 20,404.31 and 8,666.87

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Solution

The fourth proportional to 13,621.77, 20,404.31 and 8,666.87 is: 12,982.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.77 : 20,404.31 = 8,666.87 : x
  2. Step 2: Convert to fraction form
    13,621.77/20,404.31 = 8,666.87/x
  3. Step 3: Cross multiply
    13,621.77x = 20,404.31 × 8,666.87
  4. Step 4: Simplify right side
    13,621.77x = 176,841,356.85
  5. Step 5: Solve for x
    x = 176,841,356.85/13,621.77
  6. Step 6: Final answer
    x = 12,982.26

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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.