Home / 28,121.40-38,806.34-15,374.36

Finding the Fourth Proportional to 28,121.40, 38,806.34 and 15,374.36

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Solution

The fourth proportional to 28,121.40, 38,806.34 and 15,374.36 is: 21,215.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.40 : 38,806.34 = 15,374.36 : x
  2. Step 2: Convert to fraction form
    28,121.40/38,806.34 = 15,374.36/x
  3. Step 3: Cross multiply
    28,121.40x = 38,806.34 × 15,374.36
  4. Step 4: Simplify right side
    28,121.40x = 596,622,641.44
  5. Step 5: Solve for x
    x = 596,622,641.44/28,121.40
  6. Step 6: Final answer
    x = 21,215.97

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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.