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Finding the Fourth Proportional to 15,772.89, 21,765.88 and 8,602.64

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Solution

The fourth proportional to 15,772.89, 21,765.88 and 8,602.64 is: 11,871.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,772.89 : 21,765.88 = 8,602.64 : x
  2. Step 2: Convert to fraction form
    15,772.89/21,765.88 = 8,602.64/x
  3. Step 3: Cross multiply
    15,772.89x = 21,765.88 × 8,602.64
  4. Step 4: Simplify right side
    15,772.89x = 187,244,013.47
  5. Step 5: Solve for x
    x = 187,244,013.47/15,772.89
  6. Step 6: Final answer
    x = 11,871.25

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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.