Home / 13,920.28-19,209.96-7,632.64

Finding the Fourth Proportional to 13,920.28, 19,209.96 and 7,632.64

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Solution

The fourth proportional to 13,920.28, 19,209.96 and 7,632.64 is: 10,533.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.28 : 19,209.96 = 7,632.64 : x
  2. Step 2: Convert to fraction form
    13,920.28/19,209.96 = 7,632.64/x
  3. Step 3: Cross multiply
    13,920.28x = 19,209.96 × 7,632.64
  4. Step 4: Simplify right side
    13,920.28x = 146,622,709.09
  5. Step 5: Solve for x
    x = 146,622,709.09/13,920.28
  6. Step 6: Final answer
    x = 10,533.03

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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.