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Finding the Fourth Proportional to 15,777.56, 21,772.56 and 8,607.62

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Solution

The fourth proportional to 15,777.56, 21,772.56 and 8,607.62 is: 11,878.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,777.56 : 21,772.56 = 8,607.62 : x
  2. Step 2: Convert to fraction form
    15,777.56/21,772.56 = 8,607.62/x
  3. Step 3: Cross multiply
    15,777.56x = 21,772.56 × 8,607.62
  4. Step 4: Simplify right side
    15,777.56x = 187,409,771.01
  5. Step 5: Solve for x
    x = 187,409,771.01/15,777.56
  6. Step 6: Final answer
    x = 11,878.25

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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.