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Finding the Fourth Proportional to 18,552.88, 27,783.15 and 12,980.15

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Solution

The fourth proportional to 18,552.88, 27,783.15 and 12,980.15 is: 19,437.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,552.88 : 27,783.15 = 12,980.15 : x
  2. Step 2: Convert to fraction form
    18,552.88/27,783.15 = 12,980.15/x
  3. Step 3: Cross multiply
    18,552.88x = 27,783.15 × 12,980.15
  4. Step 4: Simplify right side
    18,552.88x = 360,629,454.47
  5. Step 5: Solve for x
    x = 360,629,454.47/18,552.88
  6. Step 6: Final answer
    x = 19,437.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.