Home / 13,670.80-18,864.36-8,080.72

Finding the Fourth Proportional to 13,670.80, 18,864.36 and 8,080.72

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Solution

The fourth proportional to 13,670.80, 18,864.36 and 8,080.72 is: 11,150.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,670.80 : 18,864.36 = 8,080.72 : x
  2. Step 2: Convert to fraction form
    13,670.80/18,864.36 = 8,080.72/x
  3. Step 3: Cross multiply
    13,670.80x = 18,864.36 × 8,080.72
  4. Step 4: Simplify right side
    13,670.80x = 152,437,611.14
  5. Step 5: Solve for x
    x = 152,437,611.14/13,670.80
  6. Step 6: Final answer
    x = 11,150.60

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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.