Home / 21,147.19-29,184.08-11,715.75

Finding the Fourth Proportional to 21,147.19, 29,184.08 and 11,715.75

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Solution

The fourth proportional to 21,147.19, 29,184.08 and 11,715.75 is: 16,168.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.19 : 29,184.08 = 11,715.75 : x
  2. Step 2: Convert to fraction form
    21,147.19/29,184.08 = 11,715.75/x
  3. Step 3: Cross multiply
    21,147.19x = 29,184.08 × 11,715.75
  4. Step 4: Simplify right side
    21,147.19x = 341,913,326.68
  5. Step 5: Solve for x
    x = 341,913,326.68/21,147.19
  6. Step 6: Final answer
    x = 16,168.26

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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.