Home / 20,452.24-30,681.60-12,138.40

Finding the Fourth Proportional to 20,452.24, 30,681.60 and 12,138.40

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Solution

The fourth proportional to 20,452.24, 30,681.60 and 12,138.40 is: 18,209.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,452.24 : 30,681.60 = 12,138.40 : x
  2. Step 2: Convert to fraction form
    20,452.24/30,681.60 = 12,138.40/x
  3. Step 3: Cross multiply
    20,452.24x = 30,681.60 × 12,138.40
  4. Step 4: Simplify right side
    20,452.24x = 372,425,533.44
  5. Step 5: Solve for x
    x = 372,425,533.44/20,452.24
  6. Step 6: Final answer
    x = 18,209.52

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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.