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Finding the Fourth Proportional to 13,750.69, 18,966.15 and 12,620.01

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Solution

The fourth proportional to 13,750.69, 18,966.15 and 12,620.01 is: 17,406.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,750.69 : 18,966.15 = 12,620.01 : x
  2. Step 2: Convert to fraction form
    13,750.69/18,966.15 = 12,620.01/x
  3. Step 3: Cross multiply
    13,750.69x = 18,966.15 × 12,620.01
  4. Step 4: Simplify right side
    13,750.69x = 239,353,002.66
  5. Step 5: Solve for x
    x = 239,353,002.66/13,750.69
  6. Step 6: Final answer
    x = 17,406.62

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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.