Home / 12,770.40-19,155.64-3,885.82

Finding the Fourth Proportional to 12,770.40, 19,155.64 and 3,885.82

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Solution

The fourth proportional to 12,770.40, 19,155.64 and 3,885.82 is: 5,828.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,770.40 : 19,155.64 = 3,885.82 : x
  2. Step 2: Convert to fraction form
    12,770.40/19,155.64 = 3,885.82/x
  3. Step 3: Cross multiply
    12,770.40x = 19,155.64 × 3,885.82
  4. Step 4: Simplify right side
    12,770.40x = 74,435,311.42
  5. Step 5: Solve for x
    x = 74,435,311.42/12,770.40
  6. Step 6: Final answer
    x = 5,828.74

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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.