Home / 19,729.80-27,212.76-13,978.08

Finding the Fourth Proportional to 19,729.80, 27,212.76 and 13,978.08

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Solution

The fourth proportional to 19,729.80, 27,212.76 and 13,978.08 is: 19,279.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,729.80 : 27,212.76 = 13,978.08 : x
  2. Step 2: Convert to fraction form
    19,729.80/27,212.76 = 13,978.08/x
  3. Step 3: Cross multiply
    19,729.80x = 27,212.76 × 13,978.08
  4. Step 4: Simplify right side
    19,729.80x = 380,382,136.30
  5. Step 5: Solve for x
    x = 380,382,136.30/19,729.80
  6. Step 6: Final answer
    x = 19,279.57

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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.