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Finding the Fourth Proportional to 57,999.78, 86,985.47 and 18,548.72

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Solution

The fourth proportional to 57,999.78, 86,985.47 and 18,548.72 is: 27,818.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,999.78 : 86,985.47 = 18,548.72 : x
  2. Step 2: Convert to fraction form
    57,999.78/86,985.47 = 18,548.72/x
  3. Step 3: Cross multiply
    57,999.78x = 86,985.47 × 18,548.72
  4. Step 4: Simplify right side
    57,999.78x = 1,613,469,127.10
  5. Step 5: Solve for x
    x = 1,613,469,127.10/57,999.78
  6. Step 6: Final answer
    x = 27,818.54

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1.5x scale

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.