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Finding the Fourth Proportional to 13,903.83, 19,179.71 and 8,859.15

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Solution

The fourth proportional to 13,903.83, 19,179.71 and 8,859.15 is: 12,220.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,903.83 : 19,179.71 = 8,859.15 : x
  2. Step 2: Convert to fraction form
    13,903.83/19,179.71 = 8,859.15/x
  3. Step 3: Cross multiply
    13,903.83x = 19,179.71 × 8,859.15
  4. Step 4: Simplify right side
    13,903.83x = 169,915,927.85
  5. Step 5: Solve for x
    x = 169,915,927.85/13,903.83
  6. Step 6: Final answer
    x = 12,220.80

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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.