Home / 28,535.85-42,779.43-20,189.61

Finding the Fourth Proportional to 28,535.85, 42,779.43 and 20,189.61

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Solution

The fourth proportional to 28,535.85, 42,779.43 and 20,189.61 is: 30,267.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,535.85 : 42,779.43 = 20,189.61 : x
  2. Step 2: Convert to fraction form
    28,535.85/42,779.43 = 20,189.61/x
  3. Step 3: Cross multiply
    28,535.85x = 42,779.43 × 20,189.61
  4. Step 4: Simplify right side
    28,535.85x = 863,700,007.72
  5. Step 5: Solve for x
    x = 863,700,007.72/28,535.85
  6. Step 6: Final answer
    x = 30,267.19

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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.