Home / 18,991.02-28,486.44-5,140.02

Finding the Fourth Proportional to 18,991.02, 28,486.44 and 5,140.02

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Solution

The fourth proportional to 18,991.02, 28,486.44 and 5,140.02 is: 7,710.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.02 : 28,486.44 = 5,140.02 : x
  2. Step 2: Convert to fraction form
    18,991.02/28,486.44 = 5,140.02/x
  3. Step 3: Cross multiply
    18,991.02x = 28,486.44 × 5,140.02
  4. Step 4: Simplify right side
    18,991.02x = 146,420,871.33
  5. Step 5: Solve for x
    x = 146,420,871.33/18,991.02
  6. Step 6: Final answer
    x = 7,710.01

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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.