Home / 12,591.30-18,891.60-5,196.40

Finding the Fourth Proportional to 12,591.30, 18,891.60 and 5,196.40

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Solution

The fourth proportional to 12,591.30, 18,891.60 and 5,196.40 is: 7,796.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.30 : 18,891.60 = 5,196.40 : x
  2. Step 2: Convert to fraction form
    12,591.30/18,891.60 = 5,196.40/x
  3. Step 3: Cross multiply
    12,591.30x = 18,891.60 × 5,196.40
  4. Step 4: Simplify right side
    12,591.30x = 98,168,310.24
  5. Step 5: Solve for x
    x = 98,168,310.24/12,591.30
  6. Step 6: Final answer
    x = 7,796.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.