Home / 12,780.12-19,148.92-4,455.55

Finding the Fourth Proportional to 12,780.12, 19,148.92 and 4,455.55

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Solution

The fourth proportional to 12,780.12, 19,148.92 and 4,455.55 is: 6,675.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.12 : 19,148.92 = 4,455.55 : x
  2. Step 2: Convert to fraction form
    12,780.12/19,148.92 = 4,455.55/x
  3. Step 3: Cross multiply
    12,780.12x = 19,148.92 × 4,455.55
  4. Step 4: Simplify right side
    12,780.12x = 85,318,911.49
  5. Step 5: Solve for x
    x = 85,318,911.49/12,780.12
  6. Step 6: Final answer
    x = 6,675.91

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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.