Home / 20,305.90-30,458.85-8,617.60

Finding the Fourth Proportional to 20,305.90, 30,458.85 and 8,617.60

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Solution

The fourth proportional to 20,305.90, 30,458.85 and 8,617.60 is: 12,926.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,305.90 : 30,458.85 = 8,617.60 : x
  2. Step 2: Convert to fraction form
    20,305.90/30,458.85 = 8,617.60/x
  3. Step 3: Cross multiply
    20,305.90x = 30,458.85 × 8,617.60
  4. Step 4: Simplify right side
    20,305.90x = 262,482,185.76
  5. Step 5: Solve for x
    x = 262,482,185.76/20,305.90
  6. Step 6: Final answer
    x = 12,926.40

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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.