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Finding the Fourth Proportional to 13,107.51, 18,101.22 and 11,208.15

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Solution

The fourth proportional to 13,107.51, 18,101.22 and 11,208.15 is: 15,478.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,107.51 : 18,101.22 = 11,208.15 : x
  2. Step 2: Convert to fraction form
    13,107.51/18,101.22 = 11,208.15/x
  3. Step 3: Cross multiply
    13,107.51x = 18,101.22 × 11,208.15
  4. Step 4: Simplify right side
    13,107.51x = 202,881,188.94
  5. Step 5: Solve for x
    x = 202,881,188.94/13,107.51
  6. Step 6: Final answer
    x = 15,478.24

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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.