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Finding the Fourth Proportional to 15,701.70, 21,669.56 and 8,989.44

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Solution

The fourth proportional to 15,701.70, 21,669.56 and 8,989.44 is: 12,406.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,701.70 : 21,669.56 = 8,989.44 : x
  2. Step 2: Convert to fraction form
    15,701.70/21,669.56 = 8,989.44/x
  3. Step 3: Cross multiply
    15,701.70x = 21,669.56 × 8,989.44
  4. Step 4: Simplify right side
    15,701.70x = 194,797,209.45
  5. Step 5: Solve for x
    x = 194,797,209.45/15,701.70
  6. Step 6: Final answer
    x = 12,406.12

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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.