Home / 28,855.86-43,288.65-9,139.92

Finding the Fourth Proportional to 28,855.86, 43,288.65 and 9,139.92

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Solution

The fourth proportional to 28,855.86, 43,288.65 and 9,139.92 is: 13,711.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,855.86 : 43,288.65 = 9,139.92 : x
  2. Step 2: Convert to fraction form
    28,855.86/43,288.65 = 9,139.92/x
  3. Step 3: Cross multiply
    28,855.86x = 43,288.65 × 9,139.92
  4. Step 4: Simplify right side
    28,855.86x = 395,654,797.91
  5. Step 5: Solve for x
    x = 395,654,797.91/28,855.86
  6. Step 6: Final answer
    x = 13,711.42

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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.