Home / 21,969.57-30,317.86-11,897.79

Finding the Fourth Proportional to 21,969.57, 30,317.86 and 11,897.79

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Solution

The fourth proportional to 21,969.57, 30,317.86 and 11,897.79 is: 16,418.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.57 : 30,317.86 = 11,897.79 : x
  2. Step 2: Convert to fraction form
    21,969.57/30,317.86 = 11,897.79/x
  3. Step 3: Cross multiply
    21,969.57x = 30,317.86 × 11,897.79
  4. Step 4: Simplify right side
    21,969.57x = 360,715,432.71
  5. Step 5: Solve for x
    x = 360,715,432.71/21,969.57
  6. Step 6: Final answer
    x = 16,418.86

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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.