Home / 13,615.80-18,789.10-7,647.72

Finding the Fourth Proportional to 13,615.80, 18,789.10 and 7,647.72

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Solution

The fourth proportional to 13,615.80, 18,789.10 and 7,647.72 is: 10,553.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.80 : 18,789.10 = 7,647.72 : x
  2. Step 2: Convert to fraction form
    13,615.80/18,789.10 = 7,647.72/x
  3. Step 3: Cross multiply
    13,615.80x = 18,789.10 × 7,647.72
  4. Step 4: Simplify right side
    13,615.80x = 143,693,775.85
  5. Step 5: Solve for x
    x = 143,693,775.85/13,615.80
  6. Step 6: Final answer
    x = 10,553.46

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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.