Home / 20,338.85-28,069.34-11,386.23

Finding the Fourth Proportional to 20,338.85, 28,069.34 and 11,386.23

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Solution

The fourth proportional to 20,338.85, 28,069.34 and 11,386.23 is: 15,713.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,338.85 : 28,069.34 = 11,386.23 : x
  2. Step 2: Convert to fraction form
    20,338.85/28,069.34 = 11,386.23/x
  3. Step 3: Cross multiply
    20,338.85x = 28,069.34 × 11,386.23
  4. Step 4: Simplify right side
    20,338.85x = 319,603,904.26
  5. Step 5: Solve for x
    x = 319,603,904.26/20,338.85
  6. Step 6: Final answer
    x = 15,713.97

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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.