Home / 18,860.13-28,263.38-13,890.69

Finding the Fourth Proportional to 18,860.13, 28,263.38 and 13,890.69

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Solution

The fourth proportional to 18,860.13, 28,263.38 and 13,890.69 is: 20,816.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,860.13 : 28,263.38 = 13,890.69 : x
  2. Step 2: Convert to fraction form
    18,860.13/28,263.38 = 13,890.69/x
  3. Step 3: Cross multiply
    18,860.13x = 28,263.38 × 13,890.69
  4. Step 4: Simplify right side
    18,860.13x = 392,597,780.48
  5. Step 5: Solve for x
    x = 392,597,780.48/18,860.13
  6. Step 6: Final answer
    x = 20,816.28

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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.