Home / 15,492.42-21,378.78-8,418.60

Finding the Fourth Proportional to 15,492.42, 21,378.78 and 8,418.60

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Solution

The fourth proportional to 15,492.42, 21,378.78 and 8,418.60 is: 11,617.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.42 : 21,378.78 = 8,418.60 : x
  2. Step 2: Convert to fraction form
    15,492.42/21,378.78 = 8,418.60/x
  3. Step 3: Cross multiply
    15,492.42x = 21,378.78 × 8,418.60
  4. Step 4: Simplify right side
    15,492.42x = 179,979,397.31
  5. Step 5: Solve for x
    x = 179,979,397.31/15,492.42
  6. Step 6: Final answer
    x = 11,617.26

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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.