Home / 21,245.86-29,318.21-11,812.58

Finding the Fourth Proportional to 21,245.86, 29,318.21 and 11,812.58

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Solution

The fourth proportional to 21,245.86, 29,318.21 and 11,812.58 is: 16,300.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,245.86 : 29,318.21 = 11,812.58 : x
  2. Step 2: Convert to fraction form
    21,245.86/29,318.21 = 11,812.58/x
  3. Step 3: Cross multiply
    21,245.86x = 29,318.21 × 11,812.58
  4. Step 4: Simplify right side
    21,245.86x = 346,323,701.08
  5. Step 5: Solve for x
    x = 346,323,701.08/21,245.86
  6. Step 6: Final answer
    x = 16,300.76

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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.