Home / 21,215.86-29,281.68-12,262.12

Finding the Fourth Proportional to 21,215.86, 29,281.68 and 12,262.12

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Solution

The fourth proportional to 21,215.86, 29,281.68 and 12,262.12 is: 16,923.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.86 : 29,281.68 = 12,262.12 : x
  2. Step 2: Convert to fraction form
    21,215.86/29,281.68 = 12,262.12/x
  3. Step 3: Cross multiply
    21,215.86x = 29,281.68 × 12,262.12
  4. Step 4: Simplify right side
    21,215.86x = 359,055,473.96
  5. Step 5: Solve for x
    x = 359,055,473.96/21,215.86
  6. Step 6: Final answer
    x = 16,923.92

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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.