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Finding the Fourth Proportional to 15,772.39, 21,765.93 and 8,602.31

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Solution

The fourth proportional to 15,772.39, 21,765.93 and 8,602.31 is: 11,871.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,772.39 : 21,765.93 = 8,602.31 : x
  2. Step 2: Convert to fraction form
    15,772.39/21,765.93 = 8,602.31/x
  3. Step 3: Cross multiply
    15,772.39x = 21,765.93 × 8,602.31
  4. Step 4: Simplify right side
    15,772.39x = 187,237,342.16
  5. Step 5: Solve for x
    x = 187,237,342.16/15,772.39
  6. Step 6: Final answer
    x = 11,871.21

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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.