Home / 8,720.30-13,080.65-2,146.55

Finding the Fourth Proportional to 8,720.30, 13,080.65 and 2,146.55

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Solution

The fourth proportional to 8,720.30, 13,080.65 and 2,146.55 is: 3,219.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.30 : 13,080.65 = 2,146.55 : x
  2. Step 2: Convert to fraction form
    8,720.30/13,080.65 = 2,146.55/x
  3. Step 3: Cross multiply
    8,720.30x = 13,080.65 × 2,146.55
  4. Step 4: Simplify right side
    8,720.30x = 28,078,258.52
  5. Step 5: Solve for x
    x = 28,078,258.52/8,720.30
  6. Step 6: Final answer
    x = 3,219.87

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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.