Home / 13,121.08-18,107.38-7,153.05

Finding the Fourth Proportional to 13,121.08, 18,107.38 and 7,153.05

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Solution

The fourth proportional to 13,121.08, 18,107.38 and 7,153.05 is: 9,871.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.08 : 18,107.38 = 7,153.05 : x
  2. Step 2: Convert to fraction form
    13,121.08/18,107.38 = 7,153.05/x
  3. Step 3: Cross multiply
    13,121.08x = 18,107.38 × 7,153.05
  4. Step 4: Simplify right side
    13,121.08x = 129,522,994.51
  5. Step 5: Solve for x
    x = 129,522,994.51/13,121.08
  6. Step 6: Final answer
    x = 9,871.37

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Half scale
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Double scale
Find fourth proportional to 13,122.08, 18,108.76 and 7,154.05
Similar ratio
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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.