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Finding the Fourth Proportional to 20,762.75, 28,666.40 and 15,974.26

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Solution

The fourth proportional to 20,762.75, 28,666.40 and 15,974.26 is: 22,055.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,762.75 : 28,666.40 = 15,974.26 : x
  2. Step 2: Convert to fraction form
    20,762.75/28,666.40 = 15,974.26/x
  3. Step 3: Cross multiply
    20,762.75x = 28,666.40 × 15,974.26
  4. Step 4: Simplify right side
    20,762.75x = 457,924,375.33
  5. Step 5: Solve for x
    x = 457,924,375.33/20,762.75
  6. Step 6: Final answer
    x = 22,055.09

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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.