Home / 12,985.60-17,922.46-12,393.97

Finding the Fourth Proportional to 12,985.60, 17,922.46 and 12,393.97

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Solution

The fourth proportional to 12,985.60, 17,922.46 and 12,393.97 is: 17,105.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.60 : 17,922.46 = 12,393.97 : x
  2. Step 2: Convert to fraction form
    12,985.60/17,922.46 = 12,393.97/x
  3. Step 3: Cross multiply
    12,985.60x = 17,922.46 × 12,393.97
  4. Step 4: Simplify right side
    12,985.60x = 222,130,431.57
  5. Step 5: Solve for x
    x = 222,130,431.57/12,985.60
  6. Step 6: Final answer
    x = 17,105.90

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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.