Home / 43,621.98-65,431.59-12,457.20

Finding the Fourth Proportional to 43,621.98, 65,431.59 and 12,457.20

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Solution

The fourth proportional to 43,621.98, 65,431.59 and 12,457.20 is: 18,685.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,621.98 : 65,431.59 = 12,457.20 : x
  2. Step 2: Convert to fraction form
    43,621.98/65,431.59 = 12,457.20/x
  3. Step 3: Cross multiply
    43,621.98x = 65,431.59 × 12,457.20
  4. Step 4: Simplify right side
    43,621.98x = 815,094,402.95
  5. Step 5: Solve for x
    x = 815,094,402.95/43,621.98
  6. Step 6: Final answer
    x = 18,685.41

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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.