Home / 18,090.72-27,177.48-12,838.68

Finding the Fourth Proportional to 18,090.72, 27,177.48 and 12,838.68

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Solution

The fourth proportional to 18,090.72, 27,177.48 and 12,838.68 is: 19,287.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,090.72 : 27,177.48 = 12,838.68 : x
  2. Step 2: Convert to fraction form
    18,090.72/27,177.48 = 12,838.68/x
  3. Step 3: Cross multiply
    18,090.72x = 27,177.48 × 12,838.68
  4. Step 4: Simplify right side
    18,090.72x = 348,922,968.93
  5. Step 5: Solve for x
    x = 348,922,968.93/18,090.72
  6. Step 6: Final answer
    x = 19,287.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.