Home / 28,527.80-39,367.62-15,780.65

Finding the Fourth Proportional to 28,527.80, 39,367.62 and 15,780.65

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Solution

The fourth proportional to 28,527.80, 39,367.62 and 15,780.65 is: 21,776.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,527.80 : 39,367.62 = 15,780.65 : x
  2. Step 2: Convert to fraction form
    28,527.80/39,367.62 = 15,780.65/x
  3. Step 3: Cross multiply
    28,527.80x = 39,367.62 × 15,780.65
  4. Step 4: Simplify right side
    28,527.80x = 621,246,435.71
  5. Step 5: Solve for x
    x = 621,246,435.71/28,527.80
  6. Step 6: Final answer
    x = 21,776.88

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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.