Home / 20,846.89-28,762.47-12,891.68

Finding the Fourth Proportional to 20,846.89, 28,762.47 and 12,891.68

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Solution

The fourth proportional to 20,846.89, 28,762.47 and 12,891.68 is: 17,786.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.89 : 28,762.47 = 12,891.68 : x
  2. Step 2: Convert to fraction form
    20,846.89/28,762.47 = 12,891.68/x
  3. Step 3: Cross multiply
    20,846.89x = 28,762.47 × 12,891.68
  4. Step 4: Simplify right side
    20,846.89x = 370,796,567.93
  5. Step 5: Solve for x
    x = 370,796,567.93/20,846.89
  6. Step 6: Final answer
    x = 17,786.66

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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.