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Finding the Fourth Proportional to 36,456, 54,693.72 and 17,988

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Solution

The fourth proportional to 36,456, 54,693.72 and 17,988 is: 26,986.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,456 : 54,693.72 = 17,988 : x
  2. Step 2: Convert to fraction form
    36,456/54,693.72 = 17,988/x
  3. Step 3: Cross multiply
    36,456x = 54,693.72 × 17,988
  4. Step 4: Simplify right side
    36,456x = 983,830,635.36
  5. Step 5: Solve for x
    x = 983,830,635.36/36,456
  6. Step 6: Final answer
    x = 26,986.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.