Home / 20,153.52-30,180-12,735.60

Finding the Fourth Proportional to 20,153.52, 30,180 and 12,735.60

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Solution

The fourth proportional to 20,153.52, 30,180 and 12,735.60 is: 19,071.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,153.52 : 30,180 = 12,735.60 : x
  2. Step 2: Convert to fraction form
    20,153.52/30,180 = 12,735.60/x
  3. Step 3: Cross multiply
    20,153.52x = 30,180 × 12,735.60
  4. Step 4: Simplify right side
    20,153.52x = 384,360,408
  5. Step 5: Solve for x
    x = 384,360,408/20,153.52
  6. Step 6: Final answer
    x = 19,071.63

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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.