Home / 20,783.34-28,679.92-11,830.81

Finding the Fourth Proportional to 20,783.34, 28,679.92 and 11,830.81

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Solution

The fourth proportional to 20,783.34, 28,679.92 and 11,830.81 is: 16,325.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.34 : 28,679.92 = 11,830.81 : x
  2. Step 2: Convert to fraction form
    20,783.34/28,679.92 = 11,830.81/x
  3. Step 3: Cross multiply
    20,783.34x = 28,679.92 × 11,830.81
  4. Step 4: Simplify right side
    20,783.34x = 339,306,684.34
  5. Step 5: Solve for x
    x = 339,306,684.34/20,783.34
  6. Step 6: Final answer
    x = 16,325.90

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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.