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Finding the Fourth Proportional to 18,852.24, 28,263.78 and 12,612

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Solution

The fourth proportional to 18,852.24, 28,263.78 and 12,612 is: 18,908.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,852.24 : 28,263.78 = 12,612 : x
  2. Step 2: Convert to fraction form
    18,852.24/28,263.78 = 12,612/x
  3. Step 3: Cross multiply
    18,852.24x = 28,263.78 × 12,612
  4. Step 4: Simplify right side
    18,852.24x = 356,462,793.36
  5. Step 5: Solve for x
    x = 356,462,793.36/18,852.24
  6. Step 6: Final answer
    x = 18,908.25

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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.