Home / 13,815.40-20,739.30-8,273.80

Finding the Fourth Proportional to 13,815.40, 20,739.30 and 8,273.80

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Solution

The fourth proportional to 13,815.40, 20,739.30 and 8,273.80 is: 12,420.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.40 : 20,739.30 = 8,273.80 : x
  2. Step 2: Convert to fraction form
    13,815.40/20,739.30 = 8,273.80/x
  3. Step 3: Cross multiply
    13,815.40x = 20,739.30 × 8,273.80
  4. Step 4: Simplify right side
    13,815.40x = 171,592,820.34
  5. Step 5: Solve for x
    x = 171,592,820.34/13,815.40
  6. Step 6: Final answer
    x = 12,420.40

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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.