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Finding the Fourth Proportional to 15,065.78, 20,790.99 and 8,260.44

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Solution

The fourth proportional to 15,065.78, 20,790.99 and 8,260.44 is: 11,399.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,065.78 : 20,790.99 = 8,260.44 : x
  2. Step 2: Convert to fraction form
    15,065.78/20,790.99 = 8,260.44/x
  3. Step 3: Cross multiply
    15,065.78x = 20,790.99 × 8,260.44
  4. Step 4: Simplify right side
    15,065.78x = 171,742,684.13
  5. Step 5: Solve for x
    x = 171,742,684.13/15,065.78
  6. Step 6: Final answer
    x = 11,399.52

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1.5x scale

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.