Home / 28,720.98-43,025.31-18,830.07

Finding the Fourth Proportional to 28,720.98, 43,025.31 and 18,830.07

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Solution

The fourth proportional to 28,720.98, 43,025.31 and 18,830.07 is: 28,208.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720.98 : 43,025.31 = 18,830.07 : x
  2. Step 2: Convert to fraction form
    28,720.98/43,025.31 = 18,830.07/x
  3. Step 3: Cross multiply
    28,720.98x = 43,025.31 × 18,830.07
  4. Step 4: Simplify right side
    28,720.98x = 810,169,599.07
  5. Step 5: Solve for x
    x = 810,169,599.07/28,720.98
  6. Step 6: Final answer
    x = 28,208.29

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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.