Home / 28,211.90-38,929.68-16,879.10

Finding the Fourth Proportional to 28,211.90, 38,929.68 and 16,879.10

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Solution

The fourth proportional to 28,211.90, 38,929.68 and 16,879.10 is: 23,291.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,211.90 : 38,929.68 = 16,879.10 : x
  2. Step 2: Convert to fraction form
    28,211.90/38,929.68 = 16,879.10/x
  3. Step 3: Cross multiply
    28,211.90x = 38,929.68 × 16,879.10
  4. Step 4: Simplify right side
    28,211.90x = 657,097,961.69
  5. Step 5: Solve for x
    x = 657,097,961.69/28,211.90
  6. Step 6: Final answer
    x = 23,291.52

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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.