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Finding the Fourth Proportional to 38,982.06, 53,784 and 21,985.43

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Solution

The fourth proportional to 38,982.06, 53,784 and 21,985.43 is: 30,333.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,982.06 : 53,784 = 21,985.43 : x
  2. Step 2: Convert to fraction form
    38,982.06/53,784 = 21,985.43/x
  3. Step 3: Cross multiply
    38,982.06x = 53,784 × 21,985.43
  4. Step 4: Simplify right side
    38,982.06x = 1,182,464,098.20
  5. Step 5: Solve for x
    x = 1,182,464,098.20/38,982.06
  6. Step 6: Final answer
    x = 30,333.55

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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.