Home / 12,845.40-19,231.65-9,905.10

Finding the Fourth Proportional to 12,845.40, 19,231.65 and 9,905.10

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Solution

The fourth proportional to 12,845.40, 19,231.65 and 9,905.10 is: 14,829.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,845.40 : 19,231.65 = 9,905.10 : x
  2. Step 2: Convert to fraction form
    12,845.40/19,231.65 = 9,905.10/x
  3. Step 3: Cross multiply
    12,845.40x = 19,231.65 × 9,905.10
  4. Step 4: Simplify right side
    12,845.40x = 190,491,416.42
  5. Step 5: Solve for x
    x = 190,491,416.42/12,845.40
  6. Step 6: Final answer
    x = 14,829.54

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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.