Home / 13,665.12-18,857.64-7,696.80

Finding the Fourth Proportional to 13,665.12, 18,857.64 and 7,696.80

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Solution

The fourth proportional to 13,665.12, 18,857.64 and 7,696.80 is: 10,621.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,665.12 : 18,857.64 = 7,696.80 : x
  2. Step 2: Convert to fraction form
    13,665.12/18,857.64 = 7,696.80/x
  3. Step 3: Cross multiply
    13,665.12x = 18,857.64 × 7,696.80
  4. Step 4: Simplify right side
    13,665.12x = 145,143,483.55
  5. Step 5: Solve for x
    x = 145,143,483.55/13,665.12
  6. Step 6: Final answer
    x = 10,621.46

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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.