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Finding the Fourth Proportional to 15,683.55, 21,644.43 and 8,969.01

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Solution

The fourth proportional to 15,683.55, 21,644.43 and 8,969.01 is: 12,377.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,683.55 : 21,644.43 = 8,969.01 : x
  2. Step 2: Convert to fraction form
    15,683.55/21,644.43 = 8,969.01/x
  3. Step 3: Cross multiply
    15,683.55x = 21,644.43 × 8,969.01
  4. Step 4: Simplify right side
    15,683.55x = 194,129,109.11
  5. Step 5: Solve for x
    x = 194,129,109.11/15,683.55
  6. Step 6: Final answer
    x = 12,377.88

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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.