Home / 15,492.89-21,380.33-8,419.32

Finding the Fourth Proportional to 15,492.89, 21,380.33 and 8,419.32

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Solution

The fourth proportional to 15,492.89, 21,380.33 and 8,419.32 is: 11,618.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,492.89 : 21,380.33 = 8,419.32 : x
  2. Step 2: Convert to fraction form
    15,492.89/21,380.33 = 8,419.32/x
  3. Step 3: Cross multiply
    15,492.89x = 21,380.33 × 8,419.32
  4. Step 4: Simplify right side
    15,492.89x = 180,007,839.98
  5. Step 5: Solve for x
    x = 180,007,839.98/15,492.89
  6. Step 6: Final answer
    x = 11,618.74

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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.