Home / 13,280.64-18,321.60-8,563.20

Finding the Fourth Proportional to 13,280.64, 18,321.60 and 8,563.20

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Solution

The fourth proportional to 13,280.64, 18,321.60 and 8,563.20 is: 11,813.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,280.64 : 18,321.60 = 8,563.20 : x
  2. Step 2: Convert to fraction form
    13,280.64/18,321.60 = 8,563.20/x
  3. Step 3: Cross multiply
    13,280.64x = 18,321.60 × 8,563.20
  4. Step 4: Simplify right side
    13,280.64x = 156,891,525.12
  5. Step 5: Solve for x
    x = 156,891,525.12/13,280.64
  6. Step 6: Final answer
    x = 11,813.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.