Home / 15,493.18-21,380.59-8,419.60

Finding the Fourth Proportional to 15,493.18, 21,380.59 and 8,419.60

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Solution

The fourth proportional to 15,493.18, 21,380.59 and 8,419.60 is: 11,619.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,493.18 : 21,380.59 = 8,419.60 : x
  2. Step 2: Convert to fraction form
    15,493.18/21,380.59 = 8,419.60/x
  3. Step 3: Cross multiply
    15,493.18x = 21,380.59 × 8,419.60
  4. Step 4: Simplify right side
    15,493.18x = 180,016,069.02
  5. Step 5: Solve for x
    x = 180,016,069.02/15,493.18
  6. Step 6: Final answer
    x = 11,619.05

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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.