Home / 38,556-53,211.66-21,790.08

Finding the Fourth Proportional to 38,556, 53,211.66 and 21,790.08

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Solution

The fourth proportional to 38,556, 53,211.66 and 21,790.08 is: 30,072.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,556 : 53,211.66 = 21,790.08 : x
  2. Step 2: Convert to fraction form
    38,556/53,211.66 = 21,790.08/x
  3. Step 3: Cross multiply
    38,556x = 53,211.66 × 21,790.08
  4. Step 4: Simplify right side
    38,556x = 1,159,486,328.33
  5. Step 5: Solve for x
    x = 1,159,486,328.33/38,556
  6. Step 6: Final answer
    x = 30,072.79

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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.