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Finding the Fourth Proportional to 13,762.38, 18,991.98 and 7,474.80

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Solution

The fourth proportional to 13,762.38, 18,991.98 and 7,474.80 is: 10,315.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,762.38 : 18,991.98 = 7,474.80 : x
  2. Step 2: Convert to fraction form
    13,762.38/18,991.98 = 7,474.80/x
  3. Step 3: Cross multiply
    13,762.38x = 18,991.98 × 7,474.80
  4. Step 4: Simplify right side
    13,762.38x = 141,961,252.10
  5. Step 5: Solve for x
    x = 141,961,252.10/13,762.38
  6. Step 6: Final answer
    x = 10,315.17

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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.