Home / 13,552.85-20,335.31-8,621.21

Finding the Fourth Proportional to 13,552.85, 20,335.31 and 8,621.21

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Solution

The fourth proportional to 13,552.85, 20,335.31 and 8,621.21 is: 12,935.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,552.85 : 20,335.31 = 8,621.21 : x
  2. Step 2: Convert to fraction form
    13,552.85/20,335.31 = 8,621.21/x
  3. Step 3: Cross multiply
    13,552.85x = 20,335.31 × 8,621.21
  4. Step 4: Simplify right side
    13,552.85x = 175,314,977.93
  5. Step 5: Solve for x
    x = 175,314,977.93/13,552.85
  6. Step 6: Final answer
    x = 12,935.65

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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.