Home / 28,111.76-38,791.32-15,534.80

Finding the Fourth Proportional to 28,111.76, 38,791.32 and 15,534.80

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Solution

The fourth proportional to 28,111.76, 38,791.32 and 15,534.80 is: 21,436.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,111.76 : 38,791.32 = 15,534.80 : x
  2. Step 2: Convert to fraction form
    28,111.76/38,791.32 = 15,534.80/x
  3. Step 3: Cross multiply
    28,111.76x = 38,791.32 × 15,534.80
  4. Step 4: Simplify right side
    28,111.76x = 602,615,397.94
  5. Step 5: Solve for x
    x = 602,615,397.94/28,111.76
  6. Step 6: Final answer
    x = 21,436.42

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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.