Home / 15,720.28-23,563.41-7,929.70

Finding the Fourth Proportional to 15,720.28, 23,563.41 and 7,929.70

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Solution

The fourth proportional to 15,720.28, 23,563.41 and 7,929.70 is: 11,885.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.28 : 23,563.41 = 7,929.70 : x
  2. Step 2: Convert to fraction form
    15,720.28/23,563.41 = 7,929.70/x
  3. Step 3: Cross multiply
    15,720.28x = 23,563.41 × 7,929.70
  4. Step 4: Simplify right side
    15,720.28x = 186,850,772.28
  5. Step 5: Solve for x
    x = 186,850,772.28/15,720.28
  6. Step 6: Final answer
    x = 11,885.97

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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.