Home / 21,798.60-30,085.44-12,849

Finding the Fourth Proportional to 21,798.60, 30,085.44 and 12,849

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Solution

The fourth proportional to 21,798.60, 30,085.44 and 12,849 is: 17,733.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,798.60 : 30,085.44 = 12,849 : x
  2. Step 2: Convert to fraction form
    21,798.60/30,085.44 = 12,849/x
  3. Step 3: Cross multiply
    21,798.60x = 30,085.44 × 12,849
  4. Step 4: Simplify right side
    21,798.60x = 386,567,818.56
  5. Step 5: Solve for x
    x = 386,567,818.56/21,798.60
  6. Step 6: Final answer
    x = 17,733.61

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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.