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Finding the Fourth Proportional to 18,782.59, 28,163.35 and 12,866.15

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Solution

The fourth proportional to 18,782.59, 28,163.35 and 12,866.15 is: 19,292.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.59 : 28,163.35 = 12,866.15 : x
  2. Step 2: Convert to fraction form
    18,782.59/28,163.35 = 12,866.15/x
  3. Step 3: Cross multiply
    18,782.59x = 28,163.35 × 12,866.15
  4. Step 4: Simplify right side
    18,782.59x = 362,354,024.90
  5. Step 5: Solve for x
    x = 362,354,024.90/18,782.59
  6. Step 6: Final answer
    x = 19,292.02

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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.