Home / 13,999.42-21,007.98-12,685.84

Finding the Fourth Proportional to 13,999.42, 21,007.98 and 12,685.84

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Solution

The fourth proportional to 13,999.42, 21,007.98 and 12,685.84 is: 19,036.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,999.42 : 21,007.98 = 12,685.84 : x
  2. Step 2: Convert to fraction form
    13,999.42/21,007.98 = 12,685.84/x
  3. Step 3: Cross multiply
    13,999.42x = 21,007.98 × 12,685.84
  4. Step 4: Simplify right side
    13,999.42x = 266,503,873.00
  5. Step 5: Solve for x
    x = 266,503,873.00/13,999.42
  6. Step 6: Final answer
    x = 19,036.78

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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.