Home / 21,418.97-29,559.53-11,990.57

Finding the Fourth Proportional to 21,418.97, 29,559.53 and 11,990.57

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Solution

The fourth proportional to 21,418.97, 29,559.53 and 11,990.57 is: 16,547.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.97 : 29,559.53 = 11,990.57 : x
  2. Step 2: Convert to fraction form
    21,418.97/29,559.53 = 11,990.57/x
  3. Step 3: Cross multiply
    21,418.97x = 29,559.53 × 11,990.57
  4. Step 4: Simplify right side
    21,418.97x = 354,435,495.81
  5. Step 5: Solve for x
    x = 354,435,495.81/21,418.97
  6. Step 6: Final answer
    x = 16,547.74

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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.