Home / 12,390.60-17,104.38-7,611.33

Finding the Fourth Proportional to 12,390.60, 17,104.38 and 7,611.33

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Solution

The fourth proportional to 12,390.60, 17,104.38 and 7,611.33 is: 10,506.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.60 : 17,104.38 = 7,611.33 : x
  2. Step 2: Convert to fraction form
    12,390.60/17,104.38 = 7,611.33/x
  3. Step 3: Cross multiply
    12,390.60x = 17,104.38 × 7,611.33
  4. Step 4: Simplify right side
    12,390.60x = 130,187,080.63
  5. Step 5: Solve for x
    x = 130,187,080.63/12,390.60
  6. Step 6: Final answer
    x = 10,506.92

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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.