Home / 21,405.25-29,539.25-11,973.81

Finding the Fourth Proportional to 21,405.25, 29,539.25 and 11,973.81

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Solution

The fourth proportional to 21,405.25, 29,539.25 and 11,973.81 is: 16,523.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,405.25 : 29,539.25 = 11,973.81 : x
  2. Step 2: Convert to fraction form
    21,405.25/29,539.25 = 11,973.81/x
  3. Step 3: Cross multiply
    21,405.25x = 29,539.25 × 11,973.81
  4. Step 4: Simplify right side
    21,405.25x = 353,697,367.04
  5. Step 5: Solve for x
    x = 353,697,367.04/21,405.25
  6. Step 6: Final answer
    x = 16,523.86

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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.