Home / 19,939.85-27,518.20-10,987.34

Finding the Fourth Proportional to 19,939.85, 27,518.20 and 10,987.34

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Solution

The fourth proportional to 19,939.85, 27,518.20 and 10,987.34 is: 15,163.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.85 : 27,518.20 = 10,987.34 : x
  2. Step 2: Convert to fraction form
    19,939.85/27,518.20 = 10,987.34/x
  3. Step 3: Cross multiply
    19,939.85x = 27,518.20 × 10,987.34
  4. Step 4: Simplify right side
    19,939.85x = 302,351,902.12
  5. Step 5: Solve for x
    x = 302,351,902.12/19,939.85
  6. Step 6: Final answer
    x = 15,163.20

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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.