Home / 18,415.48-25,408.94-10,861.20

Finding the Fourth Proportional to 18,415.48, 25,408.94 and 10,861.20

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Solution

The fourth proportional to 18,415.48, 25,408.94 and 10,861.20 is: 14,985.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.48 : 25,408.94 = 10,861.20 : x
  2. Step 2: Convert to fraction form
    18,415.48/25,408.94 = 10,861.20/x
  3. Step 3: Cross multiply
    18,415.48x = 25,408.94 × 10,861.20
  4. Step 4: Simplify right side
    18,415.48x = 275,971,579.13
  5. Step 5: Solve for x
    x = 275,971,579.13/18,415.48
  6. Step 6: Final answer
    x = 14,985.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.