Home / 13,188.20-19,775.90-7,338.60

Finding the Fourth Proportional to 13,188.20, 19,775.90 and 7,338.60

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Solution

The fourth proportional to 13,188.20, 19,775.90 and 7,338.60 is: 11,004.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.20 : 19,775.90 = 7,338.60 : x
  2. Step 2: Convert to fraction form
    13,188.20/19,775.90 = 7,338.60/x
  3. Step 3: Cross multiply
    13,188.20x = 19,775.90 × 7,338.60
  4. Step 4: Simplify right side
    13,188.20x = 145,127,419.74
  5. Step 5: Solve for x
    x = 145,127,419.74/13,188.20
  6. Step 6: Final answer
    x = 11,004.34

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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.