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Finding the Fourth Proportional to 12,605.65, 18,908.47 and 4,708.78

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Solution

The fourth proportional to 12,605.65, 18,908.47 and 4,708.78 is: 7,063.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,605.65 : 18,908.47 = 4,708.78 : x
  2. Step 2: Convert to fraction form
    12,605.65/18,908.47 = 4,708.78/x
  3. Step 3: Cross multiply
    12,605.65x = 18,908.47 × 4,708.78
  4. Step 4: Simplify right side
    12,605.65x = 89,035,825.37
  5. Step 5: Solve for x
    x = 89,035,825.37/12,605.65
  6. Step 6: Final answer
    x = 7,063.17

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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.