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Finding the Fourth Proportional to 15,101.21, 20,839.09 and 8,387.26

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Solution

The fourth proportional to 15,101.21, 20,839.09 and 8,387.26 is: 11,574.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.21 : 20,839.09 = 8,387.26 : x
  2. Step 2: Convert to fraction form
    15,101.21/20,839.09 = 8,387.26/x
  3. Step 3: Cross multiply
    15,101.21x = 20,839.09 × 8,387.26
  4. Step 4: Simplify right side
    15,101.21x = 174,782,925.87
  5. Step 5: Solve for x
    x = 174,782,925.87/15,101.21
  6. Step 6: Final answer
    x = 11,574.10

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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.