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Finding the Fourth Proportional to 12,470.40, 17,208.62 and 6,805.01

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Solution

The fourth proportional to 12,470.40, 17,208.62 and 6,805.01 is: 9,390.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,470.40 : 17,208.62 = 6,805.01 : x
  2. Step 2: Convert to fraction form
    12,470.40/17,208.62 = 6,805.01/x
  3. Step 3: Cross multiply
    12,470.40x = 17,208.62 × 6,805.01
  4. Step 4: Simplify right side
    12,470.40x = 117,104,711.12
  5. Step 5: Solve for x
    x = 117,104,711.12/12,470.40
  6. Step 6: Final answer
    x = 9,390.61

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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.