Home / 28,385.07-39,172.60-15,809.82

Finding the Fourth Proportional to 28,385.07, 39,172.60 and 15,809.82

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Solution

The fourth proportional to 28,385.07, 39,172.60 and 15,809.82 is: 21,818.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,385.07 : 39,172.60 = 15,809.82 : x
  2. Step 2: Convert to fraction form
    28,385.07/39,172.60 = 15,809.82/x
  3. Step 3: Cross multiply
    28,385.07x = 39,172.60 × 15,809.82
  4. Step 4: Simplify right side
    28,385.07x = 619,311,754.93
  5. Step 5: Solve for x
    x = 619,311,754.93/28,385.07
  6. Step 6: Final answer
    x = 21,818.22

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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.