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Finding the Fourth Proportional to 13,146.80, 19,734.60 and 7,314.80

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Solution

The fourth proportional to 13,146.80, 19,734.60 and 7,314.80 is: 10,980.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.80 : 19,734.60 = 7,314.80 : x
  2. Step 2: Convert to fraction form
    13,146.80/19,734.60 = 7,314.80/x
  3. Step 3: Cross multiply
    13,146.80x = 19,734.60 × 7,314.80
  4. Step 4: Simplify right side
    13,146.80x = 144,354,652.08
  5. Step 5: Solve for x
    x = 144,354,652.08/13,146.80
  6. Step 6: Final answer
    x = 10,980.21

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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.