Home / 20,387.58-28,133.91-11,433.30

Finding the Fourth Proportional to 20,387.58, 28,133.91 and 11,433.30

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Solution

The fourth proportional to 20,387.58, 28,133.91 and 11,433.30 is: 15,777.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.58 : 28,133.91 = 11,433.30 : x
  2. Step 2: Convert to fraction form
    20,387.58/28,133.91 = 11,433.30/x
  3. Step 3: Cross multiply
    20,387.58x = 28,133.91 × 11,433.30
  4. Step 4: Simplify right side
    20,387.58x = 321,663,433.20
  5. Step 5: Solve for x
    x = 321,663,433.20/20,387.58
  6. Step 6: Final answer
    x = 15,777.42

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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.