Home / 13,080.50-18,051.32-7,112.21

Finding the Fourth Proportional to 13,080.50, 18,051.32 and 7,112.21

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Solution

The fourth proportional to 13,080.50, 18,051.32 and 7,112.21 is: 9,814.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,080.50 : 18,051.32 = 7,112.21 : x
  2. Step 2: Convert to fraction form
    13,080.50/18,051.32 = 7,112.21/x
  3. Step 3: Cross multiply
    13,080.50x = 18,051.32 × 7,112.21
  4. Step 4: Simplify right side
    13,080.50x = 128,384,858.45
  5. Step 5: Solve for x
    x = 128,384,858.45/13,080.50
  6. Step 6: Final answer
    x = 9,814.98

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Double scale
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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.