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Finding the Fourth Proportional to 13,703.59, 18,911.63 and 8,326.07

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Solution

The fourth proportional to 13,703.59, 18,911.63 and 8,326.07 is: 11,490.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,703.59 : 18,911.63 = 8,326.07 : x
  2. Step 2: Convert to fraction form
    13,703.59/18,911.63 = 8,326.07/x
  3. Step 3: Cross multiply
    13,703.59x = 18,911.63 × 8,326.07
  4. Step 4: Simplify right side
    13,703.59x = 157,459,481.45
  5. Step 5: Solve for x
    x = 157,459,481.45/13,703.59
  6. Step 6: Final answer
    x = 11,490.38

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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.