Home / 13,109.14-18,090.44-7,140.68

Finding the Fourth Proportional to 13,109.14, 18,090.44 and 7,140.68

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Solution

The fourth proportional to 13,109.14, 18,090.44 and 7,140.68 is: 9,854.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.14 : 18,090.44 = 7,140.68 : x
  2. Step 2: Convert to fraction form
    13,109.14/18,090.44 = 7,140.68/x
  3. Step 3: Cross multiply
    13,109.14x = 18,090.44 × 7,140.68
  4. Step 4: Simplify right side
    13,109.14x = 129,178,043.10
  5. Step 5: Solve for x
    x = 129,178,043.10/13,109.14
  6. Step 6: Final answer
    x = 9,854.04

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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.