Home / 13,894.90-20,837.50-8,621.80

Finding the Fourth Proportional to 13,894.90, 20,837.50 and 8,621.80

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Solution

The fourth proportional to 13,894.90, 20,837.50 and 8,621.80 is: 12,929.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,894.90 : 20,837.50 = 8,621.80 : x
  2. Step 2: Convert to fraction form
    13,894.90/20,837.50 = 8,621.80/x
  3. Step 3: Cross multiply
    13,894.90x = 20,837.50 × 8,621.80
  4. Step 4: Simplify right side
    13,894.90x = 179,656,757.50
  5. Step 5: Solve for x
    x = 179,656,757.50/13,894.90
  6. Step 6: Final answer
    x = 12,929.69

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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.