Home / 13,830.10-20,720.40-8,410.60

Finding the Fourth Proportional to 13,830.10, 20,720.40 and 8,410.60

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Solution

The fourth proportional to 13,830.10, 20,720.40 and 8,410.60 is: 12,600.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,830.10 : 20,720.40 = 8,410.60 : x
  2. Step 2: Convert to fraction form
    13,830.10/20,720.40 = 8,410.60/x
  3. Step 3: Cross multiply
    13,830.10x = 20,720.40 × 8,410.60
  4. Step 4: Simplify right side
    13,830.10x = 174,270,996.24
  5. Step 5: Solve for x
    x = 174,270,996.24/13,830.10
  6. Step 6: Final answer
    x = 12,600.85

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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.