Home / 28,777.70-39,710.31-21,228.14

Finding the Fourth Proportional to 28,777.70, 39,710.31 and 21,228.14

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Solution

The fourth proportional to 28,777.70, 39,710.31 and 21,228.14 is: 29,292.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,777.70 : 39,710.31 = 21,228.14 : x
  2. Step 2: Convert to fraction form
    28,777.70/39,710.31 = 21,228.14/x
  3. Step 3: Cross multiply
    28,777.70x = 39,710.31 × 21,228.14
  4. Step 4: Simplify right side
    28,777.70x = 842,976,020.12
  5. Step 5: Solve for x
    x = 842,976,020.12/28,777.70
  6. Step 6: Final answer
    x = 29,292.68

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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.