Home / 28,305.84-39,063.36-15,729.84

Finding the Fourth Proportional to 28,305.84, 39,063.36 and 15,729.84

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Solution

The fourth proportional to 28,305.84, 39,063.36 and 15,729.84 is: 21,707.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,305.84 : 39,063.36 = 15,729.84 : x
  2. Step 2: Convert to fraction form
    28,305.84/39,063.36 = 15,729.84/x
  3. Step 3: Cross multiply
    28,305.84x = 39,063.36 × 15,729.84
  4. Step 4: Simplify right side
    28,305.84x = 614,460,402.66
  5. Step 5: Solve for x
    x = 614,460,402.66/28,305.84
  6. Step 6: Final answer
    x = 21,707.90

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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.