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Finding the Fourth Proportional to 12,809.56, 17,678.36 and 7,775.07

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Solution

The fourth proportional to 12,809.56, 17,678.36 and 7,775.07 is: 10,730.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,809.56 : 17,678.36 = 7,775.07 : x
  2. Step 2: Convert to fraction form
    12,809.56/17,678.36 = 7,775.07/x
  3. Step 3: Cross multiply
    12,809.56x = 17,678.36 × 7,775.07
  4. Step 4: Simplify right side
    12,809.56x = 137,450,486.49
  5. Step 5: Solve for x
    x = 137,450,486.49/12,809.56
  6. Step 6: Final answer
    x = 10,730.31

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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.