Home / 20,784.70-31,142.85-12,004.30

Finding the Fourth Proportional to 20,784.70, 31,142.85 and 12,004.30

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Solution

The fourth proportional to 20,784.70, 31,142.85 and 12,004.30 is: 17,986.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.70 : 31,142.85 = 12,004.30 : x
  2. Step 2: Convert to fraction form
    20,784.70/31,142.85 = 12,004.30/x
  3. Step 3: Cross multiply
    20,784.70x = 31,142.85 × 12,004.30
  4. Step 4: Simplify right side
    20,784.70x = 373,848,114.26
  5. Step 5: Solve for x
    x = 373,848,114.26/20,784.70
  6. Step 6: Final answer
    x = 17,986.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.