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Finding the Fourth Proportional to 15,103.44, 20,842.74 and 8,389.69

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Solution

The fourth proportional to 15,103.44, 20,842.74 and 8,389.69 is: 11,577.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.44 : 20,842.74 = 8,389.69 : x
  2. Step 2: Convert to fraction form
    15,103.44/20,842.74 = 8,389.69/x
  3. Step 3: Cross multiply
    15,103.44x = 20,842.74 × 8,389.69
  4. Step 4: Simplify right side
    15,103.44x = 174,864,127.35
  5. Step 5: Solve for x
    x = 174,864,127.35/15,103.44
  6. Step 6: Final answer
    x = 11,577.77

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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.