Home / 21,151.71-29,190.29-11,720.25

Finding the Fourth Proportional to 21,151.71, 29,190.29 and 11,720.25

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Solution

The fourth proportional to 21,151.71, 29,190.29 and 11,720.25 is: 16,174.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.71 : 29,190.29 = 11,720.25 : x
  2. Step 2: Convert to fraction form
    21,151.71/29,190.29 = 11,720.25/x
  3. Step 3: Cross multiply
    21,151.71x = 29,190.29 × 11,720.25
  4. Step 4: Simplify right side
    21,151.71x = 342,117,437.77
  5. Step 5: Solve for x
    x = 342,117,437.77/21,151.71
  6. Step 6: Final answer
    x = 16,174.46

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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.