Home / 13,665.40-18,857.57-7,697.43

Finding the Fourth Proportional to 13,665.40, 18,857.57 and 7,697.43

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Solution

The fourth proportional to 13,665.40, 18,857.57 and 7,697.43 is: 10,622.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.40 : 18,857.57 = 7,697.43 : x
  2. Step 2: Convert to fraction form
    13,665.40/18,857.57 = 7,697.43/x
  3. Step 3: Cross multiply
    13,665.40x = 18,857.57 × 7,697.43
  4. Step 4: Simplify right side
    13,665.40x = 145,154,786.56
  5. Step 5: Solve for x
    x = 145,154,786.56/13,665.40
  6. Step 6: Final answer
    x = 10,622.07

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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.