Home / 28,512.69-42,779.99-20,087.30

Finding the Fourth Proportional to 28,512.69, 42,779.99 and 20,087.30

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Solution

The fourth proportional to 28,512.69, 42,779.99 and 20,087.30 is: 30,138.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.69 : 42,779.99 = 20,087.30 : x
  2. Step 2: Convert to fraction form
    28,512.69/42,779.99 = 20,087.30/x
  3. Step 3: Cross multiply
    28,512.69x = 42,779.99 × 20,087.30
  4. Step 4: Simplify right side
    28,512.69x = 859,334,329.45
  5. Step 5: Solve for x
    x = 859,334,329.45/28,512.69
  6. Step 6: Final answer
    x = 30,138.66

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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.