Home / 13,890.42-19,162.31-8,511.21

Finding the Fourth Proportional to 13,890.42, 19,162.31 and 8,511.21

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Solution

The fourth proportional to 13,890.42, 19,162.31 and 8,511.21 is: 11,741.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.42 : 19,162.31 = 8,511.21 : x
  2. Step 2: Convert to fraction form
    13,890.42/19,162.31 = 8,511.21/x
  3. Step 3: Cross multiply
    13,890.42x = 19,162.31 × 8,511.21
  4. Step 4: Simplify right side
    13,890.42x = 163,094,401.94
  5. Step 5: Solve for x
    x = 163,094,401.94/13,890.42
  6. Step 6: Final answer
    x = 11,741.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.