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Finding the Fourth Proportional to 39,804.67, 54,931.73 and 21,901.65

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Solution

The fourth proportional to 39,804.67, 54,931.73 and 21,901.65 is: 30,224.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,804.67 : 54,931.73 = 21,901.65 : x
  2. Step 2: Convert to fraction form
    39,804.67/54,931.73 = 21,901.65/x
  3. Step 3: Cross multiply
    39,804.67x = 54,931.73 × 21,901.65
  4. Step 4: Simplify right side
    39,804.67x = 1,203,095,524.35
  5. Step 5: Solve for x
    x = 1,203,095,524.35/39,804.67
  6. Step 6: Final answer
    x = 30,224.98

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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.