Home / 19,855.55-27,402.06-13,129.49

Finding the Fourth Proportional to 19,855.55, 27,402.06 and 13,129.49

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Solution

The fourth proportional to 19,855.55, 27,402.06 and 13,129.49 is: 18,119.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,855.55 : 27,402.06 = 13,129.49 : x
  2. Step 2: Convert to fraction form
    19,855.55/27,402.06 = 13,129.49/x
  3. Step 3: Cross multiply
    19,855.55x = 27,402.06 × 13,129.49
  4. Step 4: Simplify right side
    19,855.55x = 359,775,072.75
  5. Step 5: Solve for x
    x = 359,775,072.75/19,855.55
  6. Step 6: Final answer
    x = 18,119.62

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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.