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Finding the Fourth Proportional to 13,751.69, 18,967.53 and 12,621.01

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Solution

The fourth proportional to 13,751.69, 18,967.53 and 12,621.01 is: 17,408.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,751.69 : 18,967.53 = 12,621.01 : x
  2. Step 2: Convert to fraction form
    13,751.69/18,967.53 = 12,621.01/x
  3. Step 3: Cross multiply
    13,751.69x = 18,967.53 × 12,621.01
  4. Step 4: Simplify right side
    13,751.69x = 239,389,385.81
  5. Step 5: Solve for x
    x = 239,389,385.81/13,751.69
  6. Step 6: Final answer
    x = 17,408.00

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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.