Home / 13,143.19-18,137.35-7,174.90

Finding the Fourth Proportional to 13,143.19, 18,137.35 and 7,174.90

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Solution

The fourth proportional to 13,143.19, 18,137.35 and 7,174.90 is: 9,901.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.19 : 18,137.35 = 7,174.90 : x
  2. Step 2: Convert to fraction form
    13,143.19/18,137.35 = 7,174.90/x
  3. Step 3: Cross multiply
    13,143.19x = 18,137.35 × 7,174.90
  4. Step 4: Simplify right side
    13,143.19x = 130,133,625.26
  5. Step 5: Solve for x
    x = 130,133,625.26/13,143.19
  6. Step 6: Final answer
    x = 9,901.22

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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.