Home / 18,878.22-28,299.65-6,389.51

Finding the Fourth Proportional to 18,878.22, 28,299.65 and 6,389.51

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Solution

The fourth proportional to 18,878.22, 28,299.65 and 6,389.51 is: 9,578.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,878.22 : 28,299.65 = 6,389.51 : x
  2. Step 2: Convert to fraction form
    18,878.22/28,299.65 = 6,389.51/x
  3. Step 3: Cross multiply
    18,878.22x = 28,299.65 × 6,389.51
  4. Step 4: Simplify right side
    18,878.22x = 180,820,723.23
  5. Step 5: Solve for x
    x = 180,820,723.23/18,878.22
  6. Step 6: Final answer
    x = 9,578.27

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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.