Home / 30,879.40-46,287.88-12,172.64

Finding the Fourth Proportional to 30,879.40, 46,287.88 and 12,172.64

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Solution

The fourth proportional to 30,879.40, 46,287.88 and 12,172.64 is: 18,246.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,879.40 : 46,287.88 = 12,172.64 : x
  2. Step 2: Convert to fraction form
    30,879.40/46,287.88 = 12,172.64/x
  3. Step 3: Cross multiply
    30,879.40x = 46,287.88 × 12,172.64
  4. Step 4: Simplify right side
    30,879.40x = 563,445,699.60
  5. Step 5: Solve for x
    x = 563,445,699.60/30,879.40
  6. Step 6: Final answer
    x = 18,246.65

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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.