Home / 28,403.50-39,155.84-19,879.24

Finding the Fourth Proportional to 28,403.50, 39,155.84 and 19,879.24

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Solution

The fourth proportional to 28,403.50, 39,155.84 and 19,879.24 is: 27,404.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,403.50 : 39,155.84 = 19,879.24 : x
  2. Step 2: Convert to fraction form
    28,403.50/39,155.84 = 19,879.24/x
  3. Step 3: Cross multiply
    28,403.50x = 39,155.84 × 19,879.24
  4. Step 4: Simplify right side
    28,403.50x = 778,388,340.76
  5. Step 5: Solve for x
    x = 778,388,340.76/28,403.50
  6. Step 6: Final answer
    x = 27,404.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.