Home / 12,788.80-19,158.09-11,395.60

Finding the Fourth Proportional to 12,788.80, 19,158.09 and 11,395.60

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Solution

The fourth proportional to 12,788.80, 19,158.09 and 11,395.60 is: 17,071.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,788.80 : 19,158.09 = 11,395.60 : x
  2. Step 2: Convert to fraction form
    12,788.80/19,158.09 = 11,395.60/x
  3. Step 3: Cross multiply
    12,788.80x = 19,158.09 × 11,395.60
  4. Step 4: Simplify right side
    12,788.80x = 218,317,930.40
  5. Step 5: Solve for x
    x = 218,317,930.40/12,788.80
  6. Step 6: Final answer
    x = 17,071.03

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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.