Home / 28,362-39,139.56-15,786.48

Finding the Fourth Proportional to 28,362, 39,139.56 and 15,786.48

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Solution

The fourth proportional to 28,362, 39,139.56 and 15,786.48 is: 21,785.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362 : 39,139.56 = 15,786.48 : x
  2. Step 2: Convert to fraction form
    28,362/39,139.56 = 15,786.48/x
  3. Step 3: Cross multiply
    28,362x = 39,139.56 × 15,786.48
  4. Step 4: Simplify right side
    28,362x = 617,875,881.15
  5. Step 5: Solve for x
    x = 617,875,881.15/28,362
  6. Step 6: Final answer
    x = 21,785.34

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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.