Home / 20,768.70-31,153.05-18,522.30

Finding the Fourth Proportional to 20,768.70, 31,153.05 and 18,522.30

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Solution

The fourth proportional to 20,768.70, 31,153.05 and 18,522.30 is: 27,783.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,768.70 : 31,153.05 = 18,522.30 : x
  2. Step 2: Convert to fraction form
    20,768.70/31,153.05 = 18,522.30/x
  3. Step 3: Cross multiply
    20,768.70x = 31,153.05 × 18,522.30
  4. Step 4: Simplify right side
    20,768.70x = 577,026,138.02
  5. Step 5: Solve for x
    x = 577,026,138.02/20,768.70
  6. Step 6: Final answer
    x = 27,783.45

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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.