Home / 12,619.08-18,941.52-10,420.80

Finding the Fourth Proportional to 12,619.08, 18,941.52 and 10,420.80

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Solution

The fourth proportional to 12,619.08, 18,941.52 and 10,420.80 is: 15,641.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.08 : 18,941.52 = 10,420.80 : x
  2. Step 2: Convert to fraction form
    12,619.08/18,941.52 = 10,420.80/x
  3. Step 3: Cross multiply
    12,619.08x = 18,941.52 × 10,420.80
  4. Step 4: Simplify right side
    12,619.08x = 197,385,791.62
  5. Step 5: Solve for x
    x = 197,385,791.62/12,619.08
  6. Step 6: Final answer
    x = 15,641.85

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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.