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Finding the Fourth Proportional to 11,907.62, 17,859.40 and 3,142.62

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Solution

The fourth proportional to 11,907.62, 17,859.40 and 3,142.62 is: 4,713.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,907.62 : 17,859.40 = 3,142.62 : x
  2. Step 2: Convert to fraction form
    11,907.62/17,859.40 = 3,142.62/x
  3. Step 3: Cross multiply
    11,907.62x = 17,859.40 × 3,142.62
  4. Step 4: Simplify right side
    11,907.62x = 56,125,307.63
  5. Step 5: Solve for x
    x = 56,125,307.63/11,907.62
  6. Step 6: Final answer
    x = 4,713.39

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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.