Home / 12,119.36-18,090.64-10,643.16

Finding the Fourth Proportional to 12,119.36, 18,090.64 and 10,643.16

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Solution

The fourth proportional to 12,119.36, 18,090.64 and 10,643.16 is: 15,887.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,119.36 : 18,090.64 = 10,643.16 : x
  2. Step 2: Convert to fraction form
    12,119.36/18,090.64 = 10,643.16/x
  3. Step 3: Cross multiply
    12,119.36x = 18,090.64 × 10,643.16
  4. Step 4: Simplify right side
    12,119.36x = 192,541,576.02
  5. Step 5: Solve for x
    x = 192,541,576.02/12,119.36
  6. Step 6: Final answer
    x = 15,887.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.