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Finding the Fourth Proportional to 28,038.56, 38,644.44 and 20,472.44

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Solution

The fourth proportional to 28,038.56, 38,644.44 and 20,472.44 is: 28,216.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,038.56 : 38,644.44 = 20,472.44 : x
  2. Step 2: Convert to fraction form
    28,038.56/38,644.44 = 20,472.44/x
  3. Step 3: Cross multiply
    28,038.56x = 38,644.44 × 20,472.44
  4. Step 4: Simplify right side
    28,038.56x = 791,145,979.23
  5. Step 5: Solve for x
    x = 791,145,979.23/28,038.56
  6. Step 6: Final answer
    x = 28,216.36

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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.