Home / 39,284.10-54,212.30-21,379.11

Finding the Fourth Proportional to 39,284.10, 54,212.30 and 21,379.11

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Solution

The fourth proportional to 39,284.10, 54,212.30 and 21,379.11 is: 29,503.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,284.10 : 54,212.30 = 21,379.11 : x
  2. Step 2: Convert to fraction form
    39,284.10/54,212.30 = 21,379.11/x
  3. Step 3: Cross multiply
    39,284.10x = 54,212.30 × 21,379.11
  4. Step 4: Simplify right side
    39,284.10x = 1,159,010,725.05
  5. Step 5: Solve for x
    x = 1,159,010,725.05/39,284.10
  6. Step 6: Final answer
    x = 29,503.30

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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.