Home / 13,539.42-18,720.72-11,878.92

Finding the Fourth Proportional to 13,539.42, 18,720.72 and 11,878.92

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Solution

The fourth proportional to 13,539.42, 18,720.72 and 11,878.92 is: 16,424.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.42 : 18,720.72 = 11,878.92 : x
  2. Step 2: Convert to fraction form
    13,539.42/18,720.72 = 11,878.92/x
  3. Step 3: Cross multiply
    13,539.42x = 18,720.72 × 11,878.92
  4. Step 4: Simplify right side
    13,539.42x = 222,381,935.22
  5. Step 5: Solve for x
    x = 222,381,935.22/13,539.42
  6. Step 6: Final answer
    x = 16,424.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.