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Finding the Fourth Proportional to 38,391.84, 52,984.62 and 21,398.85

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Solution

The fourth proportional to 38,391.84, 52,984.62 and 21,398.85 is: 29,532.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,391.84 : 52,984.62 = 21,398.85 : x
  2. Step 2: Convert to fraction form
    38,391.84/52,984.62 = 21,398.85/x
  3. Step 3: Cross multiply
    38,391.84x = 52,984.62 × 21,398.85
  4. Step 4: Simplify right side
    38,391.84x = 1,133,809,935.69
  5. Step 5: Solve for x
    x = 1,133,809,935.69/38,391.84
  6. Step 6: Final answer
    x = 29,532.58

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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.