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Finding the Fourth Proportional to 13,314.80, 19,986.60 and 7,482.80

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Solution

The fourth proportional to 13,314.80, 19,986.60 and 7,482.80 is: 11,232.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,314.80 : 19,986.60 = 7,482.80 : x
  2. Step 2: Convert to fraction form
    13,314.80/19,986.60 = 7,482.80/x
  3. Step 3: Cross multiply
    13,314.80x = 19,986.60 × 7,482.80
  4. Step 4: Simplify right side
    13,314.80x = 149,555,730.48
  5. Step 5: Solve for x
    x = 149,555,730.48/13,314.80
  6. Step 6: Final answer
    x = 11,232.29

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1.5x scale

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.