Home / 28,257.31-39,009.50-21,869.65

Finding the Fourth Proportional to 28,257.31, 39,009.50 and 21,869.65

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Solution

The fourth proportional to 28,257.31, 39,009.50 and 21,869.65 is: 30,191.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,257.31 : 39,009.50 = 21,869.65 : x
  2. Step 2: Convert to fraction form
    28,257.31/39,009.50 = 21,869.65/x
  3. Step 3: Cross multiply
    28,257.31x = 39,009.50 × 21,869.65
  4. Step 4: Simplify right side
    28,257.31x = 853,124,111.68
  5. Step 5: Solve for x
    x = 853,124,111.68/28,257.31
  6. Step 6: Final answer
    x = 30,191.27

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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.