Home / 18,720.68-28,071.60-6,236.28

Finding the Fourth Proportional to 18,720.68, 28,071.60 and 6,236.28

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Solution

The fourth proportional to 18,720.68, 28,071.60 and 6,236.28 is: 9,351.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.68 : 28,071.60 = 6,236.28 : x
  2. Step 2: Convert to fraction form
    18,720.68/28,071.60 = 6,236.28/x
  3. Step 3: Cross multiply
    18,720.68x = 28,071.60 × 6,236.28
  4. Step 4: Simplify right side
    18,720.68x = 175,062,357.65
  5. Step 5: Solve for x
    x = 175,062,357.65/18,720.68
  6. Step 6: Final answer
    x = 9,351.28

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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.