Home / 15,492.90-21,380.12-8,419.26

Finding the Fourth Proportional to 15,492.90, 21,380.12 and 8,419.26

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Solution

The fourth proportional to 15,492.90, 21,380.12 and 8,419.26 is: 11,618.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.90 : 21,380.12 = 8,419.26 : x
  2. Step 2: Convert to fraction form
    15,492.90/21,380.12 = 8,419.26/x
  3. Step 3: Cross multiply
    15,492.90x = 21,380.12 × 8,419.26
  4. Step 4: Simplify right side
    15,492.90x = 180,004,789.11
  5. Step 5: Solve for x
    x = 180,004,789.11/15,492.90
  6. Step 6: Final answer
    x = 11,618.53

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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.