Home / 13,487.91-20,131.99-12,656.85

Finding the Fourth Proportional to 13,487.91, 20,131.99 and 12,656.85

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Solution

The fourth proportional to 13,487.91, 20,131.99 and 12,656.85 is: 18,891.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.91 : 20,131.99 = 12,656.85 : x
  2. Step 2: Convert to fraction form
    13,487.91/20,131.99 = 12,656.85/x
  3. Step 3: Cross multiply
    13,487.91x = 20,131.99 × 12,656.85
  4. Step 4: Simplify right side
    13,487.91x = 254,807,577.63
  5. Step 5: Solve for x
    x = 254,807,577.63/13,487.91
  6. Step 6: Final answer
    x = 18,891.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.