Home / 20,778.89-28,674.84-12,284.07

Finding the Fourth Proportional to 20,778.89, 28,674.84 and 12,284.07

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Solution

The fourth proportional to 20,778.89, 28,674.84 and 12,284.07 is: 16,952.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.89 : 28,674.84 = 12,284.07 : x
  2. Step 2: Convert to fraction form
    20,778.89/28,674.84 = 12,284.07/x
  3. Step 3: Cross multiply
    20,778.89x = 28,674.84 × 12,284.07
  4. Step 4: Simplify right side
    20,778.89x = 352,243,741.80
  5. Step 5: Solve for x
    x = 352,243,741.80/20,778.89
  6. Step 6: Final answer
    x = 16,952.00

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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.