Home / 28,109.88-38,790.54-15,534.36

Finding the Fourth Proportional to 28,109.88, 38,790.54 and 15,534.36

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Solution

The fourth proportional to 28,109.88, 38,790.54 and 15,534.36 is: 21,436.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,109.88 : 38,790.54 = 15,534.36 : x
  2. Step 2: Convert to fraction form
    28,109.88/38,790.54 = 15,534.36/x
  3. Step 3: Cross multiply
    28,109.88x = 38,790.54 × 15,534.36
  4. Step 4: Simplify right side
    28,109.88x = 602,586,212.95
  5. Step 5: Solve for x
    x = 602,586,212.95/28,109.88
  6. Step 6: Final answer
    x = 21,436.81

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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.