Home / 15,387.72-23,078.34-6,620.28

Finding the Fourth Proportional to 15,387.72, 23,078.34 and 6,620.28

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Solution

The fourth proportional to 15,387.72, 23,078.34 and 6,620.28 is: 9,929.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,387.72 : 23,078.34 = 6,620.28 : x
  2. Step 2: Convert to fraction form
    15,387.72/23,078.34 = 6,620.28/x
  3. Step 3: Cross multiply
    15,387.72x = 23,078.34 × 6,620.28
  4. Step 4: Simplify right side
    15,387.72x = 152,785,072.74
  5. Step 5: Solve for x
    x = 152,785,072.74/15,387.72
  6. Step 6: Final answer
    x = 9,929.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.