Home / 18,306.81-27,421.34-12,387.33

Finding the Fourth Proportional to 18,306.81, 27,421.34 and 12,387.33

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Solution

The fourth proportional to 18,306.81, 27,421.34 and 12,387.33 is: 18,554.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,306.81 : 27,421.34 = 12,387.33 : x
  2. Step 2: Convert to fraction form
    18,306.81/27,421.34 = 12,387.33/x
  3. Step 3: Cross multiply
    18,306.81x = 27,421.34 × 12,387.33
  4. Step 4: Simplify right side
    18,306.81x = 339,677,125.69
  5. Step 5: Solve for x
    x = 339,677,125.69/18,306.81
  6. Step 6: Final answer
    x = 18,554.69

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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.