Home / 28,985.33-39,911.18-21,825.63

Finding the Fourth Proportional to 28,985.33, 39,911.18 and 21,825.63

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Solution

The fourth proportional to 28,985.33, 39,911.18 and 21,825.63 is: 30,052.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,985.33 : 39,911.18 = 21,825.63 : x
  2. Step 2: Convert to fraction form
    28,985.33/39,911.18 = 21,825.63/x
  3. Step 3: Cross multiply
    28,985.33x = 39,911.18 × 21,825.63
  4. Step 4: Simplify right side
    28,985.33x = 871,086,538.42
  5. Step 5: Solve for x
    x = 871,086,538.42/28,985.33
  6. Step 6: Final answer
    x = 30,052.67

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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.