Home / 28,776.70-39,708.93-21,227.14

Finding the Fourth Proportional to 28,776.70, 39,708.93 and 21,227.14

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Solution

The fourth proportional to 28,776.70, 39,708.93 and 21,227.14 is: 29,291.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,776.70 : 39,708.93 = 21,227.14 : x
  2. Step 2: Convert to fraction form
    28,776.70/39,708.93 = 21,227.14/x
  3. Step 3: Cross multiply
    28,776.70x = 39,708.93 × 21,227.14
  4. Step 4: Simplify right side
    28,776.70x = 842,907,016.36
  5. Step 5: Solve for x
    x = 842,907,016.36/28,776.70
  6. Step 6: Final answer
    x = 29,291.30

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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.