Home / 21,214.96-31,828.54-12,790.96

Finding the Fourth Proportional to 21,214.96, 31,828.54 and 12,790.96

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Solution

The fourth proportional to 21,214.96, 31,828.54 and 12,790.96 is: 19,190.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,214.96 : 31,828.54 = 12,790.96 : x
  2. Step 2: Convert to fraction form
    21,214.96/31,828.54 = 12,790.96/x
  3. Step 3: Cross multiply
    21,214.96x = 31,828.54 × 12,790.96
  4. Step 4: Simplify right side
    21,214.96x = 407,117,582.00
  5. Step 5: Solve for x
    x = 407,117,582.00/21,214.96
  6. Step 6: Final answer
    x = 19,190.12

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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.