Home / 13,656.03-18,843.78-7,689.75

Finding the Fourth Proportional to 13,656.03, 18,843.78 and 7,689.75

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Solution

The fourth proportional to 13,656.03, 18,843.78 and 7,689.75 is: 10,610.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.03 : 18,843.78 = 7,689.75 : x
  2. Step 2: Convert to fraction form
    13,656.03/18,843.78 = 7,689.75/x
  3. Step 3: Cross multiply
    13,656.03x = 18,843.78 × 7,689.75
  4. Step 4: Simplify right side
    13,656.03x = 144,903,957.26
  5. Step 5: Solve for x
    x = 144,903,957.26/13,656.03
  6. Step 6: Final answer
    x = 10,610.99

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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.