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Finding the Fourth Proportional to 43,987.56, 65,985.36 and 12,398.16

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Solution

The fourth proportional to 43,987.56, 65,985.36 and 12,398.16 is: 18,598.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,987.56 : 65,985.36 = 12,398.16 : x
  2. Step 2: Convert to fraction form
    43,987.56/65,985.36 = 12,398.16/x
  3. Step 3: Cross multiply
    43,987.56x = 65,985.36 × 12,398.16
  4. Step 4: Simplify right side
    43,987.56x = 818,097,050.94
  5. Step 5: Solve for x
    x = 818,097,050.94/43,987.56
  6. Step 6: Final answer
    x = 18,598.37

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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.