Home / 28,777.84-39,675.12-21,577.12

Finding the Fourth Proportional to 28,777.84, 39,675.12 and 21,577.12

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Solution

The fourth proportional to 28,777.84, 39,675.12 and 21,577.12 is: 29,747.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,777.84 : 39,675.12 = 21,577.12 : x
  2. Step 2: Convert to fraction form
    28,777.84/39,675.12 = 21,577.12/x
  3. Step 3: Cross multiply
    28,777.84x = 39,675.12 × 21,577.12
  4. Step 4: Simplify right side
    28,777.84x = 856,074,825.25
  5. Step 5: Solve for x
    x = 856,074,825.25/28,777.84
  6. Step 6: Final answer
    x = 29,747.71

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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.