Home / 20,290.93-28,001.63-11,338.81

Finding the Fourth Proportional to 20,290.93, 28,001.63 and 11,338.81

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Solution

The fourth proportional to 20,290.93, 28,001.63 and 11,338.81 is: 15,647.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,290.93 : 28,001.63 = 11,338.81 : x
  2. Step 2: Convert to fraction form
    20,290.93/28,001.63 = 11,338.81/x
  3. Step 3: Cross multiply
    20,290.93x = 28,001.63 × 11,338.81
  4. Step 4: Simplify right side
    20,290.93x = 317,505,162.26
  5. Step 5: Solve for x
    x = 317,505,162.26/20,290.93
  6. Step 6: Final answer
    x = 15,647.64

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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.