Home / 15,492.21-21,379.38-8,418.63

Finding the Fourth Proportional to 15,492.21, 21,379.38 and 8,418.63

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Solution

The fourth proportional to 15,492.21, 21,379.38 and 8,418.63 is: 11,617.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.21 : 21,379.38 = 8,418.63 : x
  2. Step 2: Convert to fraction form
    15,492.21/21,379.38 = 8,418.63/x
  3. Step 3: Cross multiply
    15,492.21x = 21,379.38 × 8,418.63
  4. Step 4: Simplify right side
    15,492.21x = 179,985,089.85
  5. Step 5: Solve for x
    x = 179,985,089.85/15,492.21
  6. Step 6: Final answer
    x = 11,617.78

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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.