Home / 28,451.16-42,698.52-12,879.72

Finding the Fourth Proportional to 28,451.16, 42,698.52 and 12,879.72

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Solution

The fourth proportional to 28,451.16, 42,698.52 and 12,879.72 is: 19,329.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,451.16 : 42,698.52 = 12,879.72 : x
  2. Step 2: Convert to fraction form
    28,451.16/42,698.52 = 12,879.72/x
  3. Step 3: Cross multiply
    28,451.16x = 42,698.52 × 12,879.72
  4. Step 4: Simplify right side
    28,451.16x = 549,944,982.01
  5. Step 5: Solve for x
    x = 549,944,982.01/28,451.16
  6. Step 6: Final answer
    x = 19,329.44

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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.