Home / 11,120.64-15,357.96-9,621.36

Finding the Fourth Proportional to 11,120.64, 15,357.96 and 9,621.36

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Solution

The fourth proportional to 11,120.64, 15,357.96 and 9,621.36 is: 13,287.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,120.64 : 15,357.96 = 9,621.36 : x
  2. Step 2: Convert to fraction form
    11,120.64/15,357.96 = 9,621.36/x
  3. Step 3: Cross multiply
    11,120.64x = 15,357.96 × 9,621.36
  4. Step 4: Simplify right side
    11,120.64x = 147,764,462.03
  5. Step 5: Solve for x
    x = 147,764,462.03/11,120.64
  6. Step 6: Final answer
    x = 13,287.41

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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.