Home / 21,151.84-29,189.28-11,720.08

Finding the Fourth Proportional to 21,151.84, 29,189.28 and 11,720.08

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Solution

The fourth proportional to 21,151.84, 29,189.28 and 11,720.08 is: 16,173.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.84 : 29,189.28 = 11,720.08 : x
  2. Step 2: Convert to fraction form
    21,151.84/29,189.28 = 11,720.08/x
  3. Step 3: Cross multiply
    21,151.84x = 29,189.28 × 11,720.08
  4. Step 4: Simplify right side
    21,151.84x = 342,100,696.74
  5. Step 5: Solve for x
    x = 342,100,696.74/21,151.84
  6. Step 6: Final answer
    x = 16,173.57

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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.