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Finding the Fourth Proportional to 12,783.15, 17,644.03 and 11,454.55

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Solution

The fourth proportional to 12,783.15, 17,644.03 and 11,454.55 is: 15,810.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,783.15 : 17,644.03 = 11,454.55 : x
  2. Step 2: Convert to fraction form
    12,783.15/17,644.03 = 11,454.55/x
  3. Step 3: Cross multiply
    12,783.15x = 17,644.03 × 11,454.55
  4. Step 4: Simplify right side
    12,783.15x = 202,104,351.09
  5. Step 5: Solve for x
    x = 202,104,351.09/12,783.15
  6. Step 6: Final answer
    x = 15,810.22

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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.