Home / 39,212.91-54,112.73-21,307.32

Finding the Fourth Proportional to 39,212.91, 54,112.73 and 21,307.32

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Solution

The fourth proportional to 39,212.91, 54,112.73 and 21,307.32 is: 29,403.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,212.91 : 54,112.73 = 21,307.32 : x
  2. Step 2: Convert to fraction form
    39,212.91/54,112.73 = 21,307.32/x
  3. Step 3: Cross multiply
    39,212.91x = 54,112.73 × 21,307.32
  4. Step 4: Simplify right side
    39,212.91x = 1,152,997,147.65
  5. Step 5: Solve for x
    x = 1,152,997,147.65/39,212.91
  6. Step 6: Final answer
    x = 29,403.51

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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.