Home / 28,381.16-39,169.08-15,635.65

Finding the Fourth Proportional to 28,381.16, 39,169.08 and 15,635.65

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Solution

The fourth proportional to 28,381.16, 39,169.08 and 15,635.65 is: 21,578.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.16 : 39,169.08 = 15,635.65 : x
  2. Step 2: Convert to fraction form
    28,381.16/39,169.08 = 15,635.65/x
  3. Step 3: Cross multiply
    28,381.16x = 39,169.08 × 15,635.65
  4. Step 4: Simplify right side
    28,381.16x = 612,434,074.66
  5. Step 5: Solve for x
    x = 612,434,074.66/28,381.16
  6. Step 6: Final answer
    x = 21,578.89

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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.