Home / 20,288.42-27,995.96-13,920.50

Finding the Fourth Proportional to 20,288.42, 27,995.96 and 13,920.50

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Solution

The fourth proportional to 20,288.42, 27,995.96 and 13,920.50 is: 19,208.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.42 : 27,995.96 = 13,920.50 : x
  2. Step 2: Convert to fraction form
    20,288.42/27,995.96 = 13,920.50/x
  3. Step 3: Cross multiply
    20,288.42x = 27,995.96 × 13,920.50
  4. Step 4: Simplify right side
    20,288.42x = 389,717,656.00
  5. Step 5: Solve for x
    x = 389,717,656.00/20,288.42
  6. Step 6: Final answer
    x = 19,208.87

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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.