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Finding the Fourth Proportional to 15,771.74, 21,765.01 and 8,698.62

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Solution

The fourth proportional to 15,771.74, 21,765.01 and 8,698.62 is: 12,004.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,771.74 : 21,765.01 = 8,698.62 : x
  2. Step 2: Convert to fraction form
    15,771.74/21,765.01 = 8,698.62/x
  3. Step 3: Cross multiply
    15,771.74x = 21,765.01 × 8,698.62
  4. Step 4: Simplify right side
    15,771.74x = 189,325,551.29
  5. Step 5: Solve for x
    x = 189,325,551.29/15,771.74
  6. Step 6: Final answer
    x = 12,004.10

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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.