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Finding the Fourth Proportional to 13,810.51, 20,759.51 and 11,885.95

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Solution

The fourth proportional to 13,810.51, 20,759.51 and 11,885.95 is: 17,866.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,810.51 : 20,759.51 = 11,885.95 : x
  2. Step 2: Convert to fraction form
    13,810.51/20,759.51 = 11,885.95/x
  3. Step 3: Cross multiply
    13,810.51x = 20,759.51 × 11,885.95
  4. Step 4: Simplify right side
    13,810.51x = 246,746,497.88
  5. Step 5: Solve for x
    x = 246,746,497.88/13,810.51
  6. Step 6: Final answer
    x = 17,866.57

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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.