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Finding the Fourth Proportional to 15,701.58, 21,669.38 and 8,989.31

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Solution

The fourth proportional to 15,701.58, 21,669.38 and 8,989.31 is: 12,405.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,701.58 : 21,669.38 = 8,989.31 : x
  2. Step 2: Convert to fraction form
    15,701.58/21,669.38 = 8,989.31/x
  3. Step 3: Cross multiply
    15,701.58x = 21,669.38 × 8,989.31
  4. Step 4: Simplify right side
    15,701.58x = 194,792,774.33
  5. Step 5: Solve for x
    x = 194,792,774.33/15,701.58
  6. Step 6: Final answer
    x = 12,405.93

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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.