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Finding the Fourth Proportional to 13,124.91, 18,112.44 and 8,411.93

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Solution

The fourth proportional to 13,124.91, 18,112.44 and 8,411.93 is: 11,608.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,124.91 : 18,112.44 = 8,411.93 : x
  2. Step 2: Convert to fraction form
    13,124.91/18,112.44 = 8,411.93/x
  3. Step 3: Cross multiply
    13,124.91x = 18,112.44 × 8,411.93
  4. Step 4: Simplify right side
    13,124.91x = 152,360,486.85
  5. Step 5: Solve for x
    x = 152,360,486.85/13,124.91
  6. Step 6: Final answer
    x = 11,608.50

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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.