Home / 13,709.25-18,918.34-7,740.56

Finding the Fourth Proportional to 13,709.25, 18,918.34 and 7,740.56

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Solution

The fourth proportional to 13,709.25, 18,918.34 and 7,740.56 is: 10,681.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.25 : 18,918.34 = 7,740.56 : x
  2. Step 2: Convert to fraction form
    13,709.25/18,918.34 = 7,740.56/x
  3. Step 3: Cross multiply
    13,709.25x = 18,918.34 × 7,740.56
  4. Step 4: Simplify right side
    13,709.25x = 146,438,545.87
  5. Step 5: Solve for x
    x = 146,438,545.87/13,709.25
  6. Step 6: Final answer
    x = 10,681.73

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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.