Home / 12,756.26-19,109.64-10,128.62

Finding the Fourth Proportional to 12,756.26, 19,109.64 and 10,128.62

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Solution

The fourth proportional to 12,756.26, 19,109.64 and 10,128.62 is: 15,173.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,756.26 : 19,109.64 = 10,128.62 : x
  2. Step 2: Convert to fraction form
    12,756.26/19,109.64 = 10,128.62/x
  3. Step 3: Cross multiply
    12,756.26x = 19,109.64 × 10,128.62
  4. Step 4: Simplify right side
    12,756.26x = 193,554,281.90
  5. Step 5: Solve for x
    x = 193,554,281.90/12,756.26
  6. Step 6: Final answer
    x = 15,173.28

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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.