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Finding the Fourth Proportional to 12,813.12, 19,219.68 and 6,968.16

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Solution

The fourth proportional to 12,813.12, 19,219.68 and 6,968.16 is: 10,452.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,813.12 : 19,219.68 = 6,968.16 : x
  2. Step 2: Convert to fraction form
    12,813.12/19,219.68 = 6,968.16/x
  3. Step 3: Cross multiply
    12,813.12x = 19,219.68 × 6,968.16
  4. Step 4: Simplify right side
    12,813.12x = 133,925,805.39
  5. Step 5: Solve for x
    x = 133,925,805.39/12,813.12
  6. Step 6: Final answer
    x = 10,452.24

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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.