Home / 20,776.89-28,672.08-12,282.07

Finding the Fourth Proportional to 20,776.89, 28,672.08 and 12,282.07

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Solution

The fourth proportional to 20,776.89, 28,672.08 and 12,282.07 is: 16,949.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.89 : 28,672.08 = 12,282.07 : x
  2. Step 2: Convert to fraction form
    20,776.89/28,672.08 = 12,282.07/x
  3. Step 3: Cross multiply
    20,776.89x = 28,672.08 × 12,282.07
  4. Step 4: Simplify right side
    20,776.89x = 352,152,648.47
  5. Step 5: Solve for x
    x = 352,152,648.47/20,776.89
  6. Step 6: Final answer
    x = 16,949.25

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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.