Home / 13,219.40-19,829.10-9,891.12

Finding the Fourth Proportional to 13,219.40, 19,829.10 and 9,891.12

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Solution

The fourth proportional to 13,219.40, 19,829.10 and 9,891.12 is: 14,836.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.40 : 19,829.10 = 9,891.12 : x
  2. Step 2: Convert to fraction form
    13,219.40/19,829.10 = 9,891.12/x
  3. Step 3: Cross multiply
    13,219.40x = 19,829.10 × 9,891.12
  4. Step 4: Simplify right side
    13,219.40x = 196,132,007.59
  5. Step 5: Solve for x
    x = 196,132,007.59/13,219.40
  6. Step 6: Final answer
    x = 14,836.68

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Double scale
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Similar ratio
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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.