Home / 13,391.20-18,477.90-7,725.52

Finding the Fourth Proportional to 13,391.20, 18,477.90 and 7,725.52

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Solution

The fourth proportional to 13,391.20, 18,477.90 and 7,725.52 is: 10,660.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.20 : 18,477.90 = 7,725.52 : x
  2. Step 2: Convert to fraction form
    13,391.20/18,477.90 = 7,725.52/x
  3. Step 3: Cross multiply
    13,391.20x = 18,477.90 × 7,725.52
  4. Step 4: Simplify right side
    13,391.20x = 142,751,386.01
  5. Step 5: Solve for x
    x = 142,751,386.01/13,391.20
  6. Step 6: Final answer
    x = 10,660.09

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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.