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Finding the Fourth Proportional to 12,807.58, 17,675.97 and 7,143.22

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Solution

The fourth proportional to 12,807.58, 17,675.97 and 7,143.22 is: 9,858.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,807.58 : 17,675.97 = 7,143.22 : x
  2. Step 2: Convert to fraction form
    12,807.58/17,675.97 = 7,143.22/x
  3. Step 3: Cross multiply
    12,807.58x = 17,675.97 × 7,143.22
  4. Step 4: Simplify right side
    12,807.58x = 126,263,342.42
  5. Step 5: Solve for x
    x = 126,263,342.42/12,807.58
  6. Step 6: Final answer
    x = 9,858.49

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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.