Home / 13,758.36-18,986.17-7,790.60

Finding the Fourth Proportional to 13,758.36, 18,986.17 and 7,790.60

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Solution

The fourth proportional to 13,758.36, 18,986.17 and 7,790.60 is: 10,750.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.36 : 18,986.17 = 7,790.60 : x
  2. Step 2: Convert to fraction form
    13,758.36/18,986.17 = 7,790.60/x
  3. Step 3: Cross multiply
    13,758.36x = 18,986.17 × 7,790.60
  4. Step 4: Simplify right side
    13,758.36x = 147,913,522.12
  5. Step 5: Solve for x
    x = 147,913,522.12/13,758.36
  6. Step 6: Final answer
    x = 10,750.81

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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.