Home / 21,390.51-29,516.32-11,829.09

Finding the Fourth Proportional to 21,390.51, 29,516.32 and 11,829.09

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Solution

The fourth proportional to 21,390.51, 29,516.32 and 11,829.09 is: 16,322.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.51 : 29,516.32 = 11,829.09 : x
  2. Step 2: Convert to fraction form
    21,390.51/29,516.32 = 11,829.09/x
  3. Step 3: Cross multiply
    21,390.51x = 29,516.32 × 11,829.09
  4. Step 4: Simplify right side
    21,390.51x = 349,151,205.75
  5. Step 5: Solve for x
    x = 349,151,205.75/21,390.51
  6. Step 6: Final answer
    x = 16,322.72

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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.