Home / 21,187.69-29,238.71-11,756.29

Finding the Fourth Proportional to 21,187.69, 29,238.71 and 11,756.29

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Solution

The fourth proportional to 21,187.69, 29,238.71 and 11,756.29 is: 16,223.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.69 : 29,238.71 = 11,756.29 : x
  2. Step 2: Convert to fraction form
    21,187.69/29,238.71 = 11,756.29/x
  3. Step 3: Cross multiply
    21,187.69x = 29,238.71 × 11,756.29
  4. Step 4: Simplify right side
    21,187.69x = 343,738,753.99
  5. Step 5: Solve for x
    x = 343,738,753.99/21,187.69
  6. Step 6: Final answer
    x = 16,223.51

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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.