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Finding the Fourth Proportional to 15,772.56, 21,765.84 and 8,602.53

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Solution

The fourth proportional to 15,772.56, 21,765.84 and 8,602.53 is: 11,871.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,772.56 : 21,765.84 = 8,602.53 : x
  2. Step 2: Convert to fraction form
    15,772.56/21,765.84 = 8,602.53/x
  3. Step 3: Cross multiply
    15,772.56x = 21,765.84 × 8,602.53
  4. Step 4: Simplify right side
    15,772.56x = 187,241,291.58
  5. Step 5: Solve for x
    x = 187,241,291.58/15,772.56
  6. Step 6: Final answer
    x = 11,871.33

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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.