Home / 20,670.73-28,515.59-12,281.29

Finding the Fourth Proportional to 20,670.73, 28,515.59 and 12,281.29

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Solution

The fourth proportional to 20,670.73, 28,515.59 and 12,281.29 is: 16,942.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.73 : 28,515.59 = 12,281.29 : x
  2. Step 2: Convert to fraction form
    20,670.73/28,515.59 = 12,281.29/x
  3. Step 3: Cross multiply
    20,670.73x = 28,515.59 × 12,281.29
  4. Step 4: Simplify right side
    20,670.73x = 350,208,168.90
  5. Step 5: Solve for x
    x = 350,208,168.90/20,670.73
  6. Step 6: Final answer
    x = 16,942.23

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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.