Home / 20,908.20-31,362.30-13,897.65

Finding the Fourth Proportional to 20,908.20, 31,362.30 and 13,897.65

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Solution

The fourth proportional to 20,908.20, 31,362.30 and 13,897.65 is: 20,846.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.20 : 31,362.30 = 13,897.65 : x
  2. Step 2: Convert to fraction form
    20,908.20/31,362.30 = 13,897.65/x
  3. Step 3: Cross multiply
    20,908.20x = 31,362.30 × 13,897.65
  4. Step 4: Simplify right side
    20,908.20x = 435,862,268.60
  5. Step 5: Solve for x
    x = 435,862,268.60/20,908.20
  6. Step 6: Final answer
    x = 20,846.48

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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.