Home / 19,171.11-28,742.31-12,913.55

Finding the Fourth Proportional to 19,171.11, 28,742.31 and 12,913.55

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Solution

The fourth proportional to 19,171.11, 28,742.31 and 12,913.55 is: 19,360.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,171.11 : 28,742.31 = 12,913.55 : x
  2. Step 2: Convert to fraction form
    19,171.11/28,742.31 = 12,913.55/x
  3. Step 3: Cross multiply
    19,171.11x = 28,742.31 × 12,913.55
  4. Step 4: Simplify right side
    19,171.11x = 371,165,247.73
  5. Step 5: Solve for x
    x = 371,165,247.73/19,171.11
  6. Step 6: Final answer
    x = 19,360.66

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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.