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Finding the Fourth Proportional to 35,985.48, 53,978.23 and 12,611.92

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Solution

The fourth proportional to 35,985.48, 53,978.23 and 12,611.92 is: 18,917.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,985.48 : 53,978.23 = 12,611.92 : x
  2. Step 2: Convert to fraction form
    35,985.48/53,978.23 = 12,611.92/x
  3. Step 3: Cross multiply
    35,985.48x = 53,978.23 × 12,611.92
  4. Step 4: Simplify right side
    35,985.48x = 680,769,118.50
  5. Step 5: Solve for x
    x = 680,769,118.50/35,985.48
  6. Step 6: Final answer
    x = 18,917.88

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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.