Home / 20,288.30-27,995.80-13,920.37

Finding the Fourth Proportional to 20,288.30, 27,995.80 and 13,920.37

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Solution

The fourth proportional to 20,288.30, 27,995.80 and 13,920.37 is: 19,208.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.30 : 27,995.80 = 13,920.37 : x
  2. Step 2: Convert to fraction form
    20,288.30/27,995.80 = 13,920.37/x
  3. Step 3: Cross multiply
    20,288.30x = 27,995.80 × 13,920.37
  4. Step 4: Simplify right side
    20,288.30x = 389,711,684.87
  5. Step 5: Solve for x
    x = 389,711,684.87/20,288.30
  6. Step 6: Final answer
    x = 19,208.70

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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.