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Finding the Fourth Proportional to 13,762.10, 18,991.91 and 7,474.52

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Solution

The fourth proportional to 13,762.10, 18,991.91 and 7,474.52 is: 10,314.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,762.10 : 18,991.91 = 7,474.52 : x
  2. Step 2: Convert to fraction form
    13,762.10/18,991.91 = 7,474.52/x
  3. Step 3: Cross multiply
    13,762.10x = 18,991.91 × 7,474.52
  4. Step 4: Simplify right side
    13,762.10x = 141,955,411.13
  5. Step 5: Solve for x
    x = 141,955,411.13/13,762.10
  6. Step 6: Final answer
    x = 10,314.95

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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.