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Finding the Fourth Proportional to 15,089.81, 20,823.62 and 8,375.03

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Solution

The fourth proportional to 15,089.81, 20,823.62 and 8,375.03 is: 11,557.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,089.81 : 20,823.62 = 8,375.03 : x
  2. Step 2: Convert to fraction form
    15,089.81/20,823.62 = 8,375.03/x
  3. Step 3: Cross multiply
    15,089.81x = 20,823.62 × 8,375.03
  4. Step 4: Simplify right side
    15,089.81x = 174,398,483.80
  5. Step 5: Solve for x
    x = 174,398,483.80/15,089.81
  6. Step 6: Final answer
    x = 11,557.37

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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.