Home / 28,775.66-39,707.55-21,226.07

Finding the Fourth Proportional to 28,775.66, 39,707.55 and 21,226.07

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Solution

The fourth proportional to 28,775.66, 39,707.55 and 21,226.07 is: 29,289.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,775.66 : 39,707.55 = 21,226.07 : x
  2. Step 2: Convert to fraction form
    28,775.66/39,707.55 = 21,226.07/x
  3. Step 3: Cross multiply
    28,775.66x = 39,707.55 × 21,226.07
  4. Step 4: Simplify right side
    28,775.66x = 842,835,235.83
  5. Step 5: Solve for x
    x = 842,835,235.83/28,775.66
  6. Step 6: Final answer
    x = 29,289.87

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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.