Home / 12,390.40-18,597.30-7,696.18

Finding the Fourth Proportional to 12,390.40, 18,597.30 and 7,696.18

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Solution

The fourth proportional to 12,390.40, 18,597.30 and 7,696.18 is: 11,551.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,390.40 : 18,597.30 = 7,696.18 : x
  2. Step 2: Convert to fraction form
    12,390.40/18,597.30 = 7,696.18/x
  3. Step 3: Cross multiply
    12,390.40x = 18,597.30 × 7,696.18
  4. Step 4: Simplify right side
    12,390.40x = 143,128,168.31
  5. Step 5: Solve for x
    x = 143,128,168.31/12,390.40
  6. Step 6: Final answer
    x = 11,551.54

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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.