Home / 12,845.55-19,278.06-5,455.20

Finding the Fourth Proportional to 12,845.55, 19,278.06 and 5,455.20

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Solution

The fourth proportional to 12,845.55, 19,278.06 and 5,455.20 is: 8,186.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,845.55 : 19,278.06 = 5,455.20 : x
  2. Step 2: Convert to fraction form
    12,845.55/19,278.06 = 5,455.20/x
  3. Step 3: Cross multiply
    12,845.55x = 19,278.06 × 5,455.20
  4. Step 4: Simplify right side
    12,845.55x = 105,165,654.67
  5. Step 5: Solve for x
    x = 105,165,654.67/12,845.55
  6. Step 6: Final answer
    x = 8,186.93

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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.