Home / 18,511.70-25,546.77-10,128.20

Finding the Fourth Proportional to 18,511.70, 25,546.77 and 10,128.20

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Solution

The fourth proportional to 18,511.70, 25,546.77 and 10,128.20 is: 13,977.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,511.70 : 25,546.77 = 10,128.20 : x
  2. Step 2: Convert to fraction form
    18,511.70/25,546.77 = 10,128.20/x
  3. Step 3: Cross multiply
    18,511.70x = 25,546.77 × 10,128.20
  4. Step 4: Simplify right side
    18,511.70x = 258,742,668.18
  5. Step 5: Solve for x
    x = 258,742,668.18/18,511.70
  6. Step 6: Final answer
    x = 13,977.25

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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.