Home / 12,628.45-17,421.42-8,153.65

Finding the Fourth Proportional to 12,628.45, 17,421.42 and 8,153.65

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Solution

The fourth proportional to 12,628.45, 17,421.42 and 8,153.65 is: 11,248.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,628.45 : 17,421.42 = 8,153.65 : x
  2. Step 2: Convert to fraction form
    12,628.45/17,421.42 = 8,153.65/x
  3. Step 3: Cross multiply
    12,628.45x = 17,421.42 × 8,153.65
  4. Step 4: Simplify right side
    12,628.45x = 142,048,161.18
  5. Step 5: Solve for x
    x = 142,048,161.18/12,628.45
  6. Step 6: Final answer
    x = 11,248.27

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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.