Home / 13,140.24-18,133.65-7,171.97

Finding the Fourth Proportional to 13,140.24, 18,133.65 and 7,171.97

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Solution

The fourth proportional to 13,140.24, 18,133.65 and 7,171.97 is: 9,897.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.24 : 18,133.65 = 7,171.97 : x
  2. Step 2: Convert to fraction form
    13,140.24/18,133.65 = 7,171.97/x
  3. Step 3: Cross multiply
    13,140.24x = 18,133.65 × 7,171.97
  4. Step 4: Simplify right side
    13,140.24x = 130,053,903.12
  5. Step 5: Solve for x
    x = 130,053,903.12/13,140.24
  6. Step 6: Final answer
    x = 9,897.38

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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.