Home / 21,967.11-30,315.20-12,406.23

Finding the Fourth Proportional to 21,967.11, 30,315.20 and 12,406.23

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Solution

The fourth proportional to 21,967.11, 30,315.20 and 12,406.23 is: 17,120.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,967.11 : 30,315.20 = 12,406.23 : x
  2. Step 2: Convert to fraction form
    21,967.11/30,315.20 = 12,406.23/x
  3. Step 3: Cross multiply
    21,967.11x = 30,315.20 × 12,406.23
  4. Step 4: Simplify right side
    21,967.11x = 376,097,281.66
  5. Step 5: Solve for x
    x = 376,097,281.66/21,967.11
  6. Step 6: Final answer
    x = 17,120.93

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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.