Home / 20,369.66-28,111.25-11,420.04

Finding the Fourth Proportional to 20,369.66, 28,111.25 and 11,420.04

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Solution

The fourth proportional to 20,369.66, 28,111.25 and 11,420.04 is: 15,760.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,369.66 : 28,111.25 = 11,420.04 : x
  2. Step 2: Convert to fraction form
    20,369.66/28,111.25 = 11,420.04/x
  3. Step 3: Cross multiply
    20,369.66x = 28,111.25 × 11,420.04
  4. Step 4: Simplify right side
    20,369.66x = 321,031,599.45
  5. Step 5: Solve for x
    x = 321,031,599.45/20,369.66
  6. Step 6: Final answer
    x = 15,760.28

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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.