Home / 13,707.08-18,916.11-7,738.84

Finding the Fourth Proportional to 13,707.08, 18,916.11 and 7,738.84

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Solution

The fourth proportional to 13,707.08, 18,916.11 and 7,738.84 is: 10,679.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,707.08 : 18,916.11 = 7,738.84 : x
  2. Step 2: Convert to fraction form
    13,707.08/18,916.11 = 7,738.84/x
  3. Step 3: Cross multiply
    13,707.08x = 18,916.11 × 7,738.84
  4. Step 4: Simplify right side
    13,707.08x = 146,388,654.13
  5. Step 5: Solve for x
    x = 146,388,654.13/13,707.08
  6. Step 6: Final answer
    x = 10,679.78

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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.