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Finding the Fourth Proportional to 12,955.76, 17,858.40 and 9,764.36

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Solution

The fourth proportional to 12,955.76, 17,858.40 and 9,764.36 is: 13,459.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,955.76 : 17,858.40 = 9,764.36 : x
  2. Step 2: Convert to fraction form
    12,955.76/17,858.40 = 9,764.36/x
  3. Step 3: Cross multiply
    12,955.76x = 17,858.40 × 9,764.36
  4. Step 4: Simplify right side
    12,955.76x = 174,375,846.62
  5. Step 5: Solve for x
    x = 174,375,846.62/12,955.76
  6. Step 6: Final answer
    x = 13,459.33

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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.