Home / 15,492.11-21,378.68-8,418.53

Finding the Fourth Proportional to 15,492.11, 21,378.68 and 8,418.53

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Solution

The fourth proportional to 15,492.11, 21,378.68 and 8,418.53 is: 11,617.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.11 : 21,378.68 = 8,418.53 : x
  2. Step 2: Convert to fraction form
    15,492.11/21,378.68 = 8,418.53/x
  3. Step 3: Cross multiply
    15,492.11x = 21,378.68 × 8,418.53
  4. Step 4: Simplify right side
    15,492.11x = 179,977,149.22
  5. Step 5: Solve for x
    x = 179,977,149.22/15,492.11
  6. Step 6: Final answer
    x = 11,617.34

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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.