Home / 28,291.12-39,039.41-15,543.65

Finding the Fourth Proportional to 28,291.12, 39,039.41 and 15,543.65

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Solution

The fourth proportional to 28,291.12, 39,039.41 and 15,543.65 is: 21,448.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,291.12 : 39,039.41 = 15,543.65 : x
  2. Step 2: Convert to fraction form
    28,291.12/39,039.41 = 15,543.65/x
  3. Step 3: Cross multiply
    28,291.12x = 39,039.41 × 15,543.65
  4. Step 4: Simplify right side
    28,291.12x = 606,815,061.70
  5. Step 5: Solve for x
    x = 606,815,061.70/28,291.12
  6. Step 6: Final answer
    x = 21,448.96

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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.