Home / 21,651.60-29,879.04-12,219.84

Finding the Fourth Proportional to 21,651.60, 29,879.04 and 12,219.84

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Solution

The fourth proportional to 21,651.60, 29,879.04 and 12,219.84 is: 16,863.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.60 : 29,879.04 = 12,219.84 : x
  2. Step 2: Convert to fraction form
    21,651.60/29,879.04 = 12,219.84/x
  3. Step 3: Cross multiply
    21,651.60x = 29,879.04 × 12,219.84
  4. Step 4: Simplify right side
    21,651.60x = 365,117,088.15
  5. Step 5: Solve for x
    x = 365,117,088.15/21,651.60
  6. Step 6: Final answer
    x = 16,863.28

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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.