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Finding the Fourth Proportional to 15,101.69, 20,840.22 and 8,387.35

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Solution

The fourth proportional to 15,101.69, 20,840.22 and 8,387.35 is: 11,574.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.69 : 20,840.22 = 8,387.35 : x
  2. Step 2: Convert to fraction form
    15,101.69/20,840.22 = 8,387.35/x
  3. Step 3: Cross multiply
    15,101.69x = 20,840.22 × 8,387.35
  4. Step 4: Simplify right side
    15,101.69x = 174,794,167.12
  5. Step 5: Solve for x
    x = 174,794,167.12/15,101.69
  6. Step 6: Final answer
    x = 11,574.48

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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.