Home / 8,720.16-13,080.12-2,146.35

Finding the Fourth Proportional to 8,720.16, 13,080.12 and 2,146.35

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Solution

The fourth proportional to 8,720.16, 13,080.12 and 2,146.35 is: 3,219.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.16 : 13,080.12 = 2,146.35 : x
  2. Step 2: Convert to fraction form
    8,720.16/13,080.12 = 2,146.35/x
  3. Step 3: Cross multiply
    8,720.16x = 13,080.12 × 2,146.35
  4. Step 4: Simplify right side
    8,720.16x = 28,074,515.56
  5. Step 5: Solve for x
    x = 28,074,515.56/8,720.16
  6. Step 6: Final answer
    x = 3,219.50

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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.