Home / 30,556.89-45,729.63-21,133.65

Finding the Fourth Proportional to 30,556.89, 45,729.63 and 21,133.65

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Solution

The fourth proportional to 30,556.89, 45,729.63 and 21,133.65 is: 31,627.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,556.89 : 45,729.63 = 21,133.65 : x
  2. Step 2: Convert to fraction form
    30,556.89/45,729.63 = 21,133.65/x
  3. Step 3: Cross multiply
    30,556.89x = 45,729.63 × 21,133.65
  4. Step 4: Simplify right side
    30,556.89x = 966,433,995.05
  5. Step 5: Solve for x
    x = 966,433,995.05/30,556.89
  6. Step 6: Final answer
    x = 31,627.37

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.