Home / 13,109.33-18,090.96-7,140.95

Finding the Fourth Proportional to 13,109.33, 18,090.96 and 7,140.95

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Solution

The fourth proportional to 13,109.33, 18,090.96 and 7,140.95 is: 9,854.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.33 : 18,090.96 = 7,140.95 : x
  2. Step 2: Convert to fraction form
    13,109.33/18,090.96 = 7,140.95/x
  3. Step 3: Cross multiply
    13,109.33x = 18,090.96 × 7,140.95
  4. Step 4: Simplify right side
    13,109.33x = 129,186,550.36
  5. Step 5: Solve for x
    x = 129,186,550.36/13,109.33
  6. Step 6: Final answer
    x = 9,854.55

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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.