Home / 21,389.69-29,517.96-11,830.22

Finding the Fourth Proportional to 21,389.69, 29,517.96 and 11,830.22

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Solution

The fourth proportional to 21,389.69, 29,517.96 and 11,830.22 is: 16,325.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,389.69 : 29,517.96 = 11,830.22 : x
  2. Step 2: Convert to fraction form
    21,389.69/29,517.96 = 11,830.22/x
  3. Step 3: Cross multiply
    21,389.69x = 29,517.96 × 11,830.22
  4. Step 4: Simplify right side
    21,389.69x = 349,203,813.16
  5. Step 5: Solve for x
    x = 349,203,813.16/21,389.69
  6. Step 6: Final answer
    x = 16,325.80

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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.