Home / 13,759.09-18,991.13-12,824.15

Finding the Fourth Proportional to 13,759.09, 18,991.13 and 12,824.15

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Solution

The fourth proportional to 13,759.09, 18,991.13 and 12,824.15 is: 17,700.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.09 : 18,991.13 = 12,824.15 : x
  2. Step 2: Convert to fraction form
    13,759.09/18,991.13 = 12,824.15/x
  3. Step 3: Cross multiply
    13,759.09x = 18,991.13 × 12,824.15
  4. Step 4: Simplify right side
    13,759.09x = 243,544,940.71
  5. Step 5: Solve for x
    x = 243,544,940.71/13,759.09
  6. Step 6: Final answer
    x = 17,700.66

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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.