Home / 13,143.42-18,137.67-7,175.13

Finding the Fourth Proportional to 13,143.42, 18,137.67 and 7,175.13

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Solution

The fourth proportional to 13,143.42, 18,137.67 and 7,175.13 is: 9,901.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.42 : 18,137.67 = 7,175.13 : x
  2. Step 2: Convert to fraction form
    13,143.42/18,137.67 = 7,175.13/x
  3. Step 3: Cross multiply
    13,143.42x = 18,137.67 × 7,175.13
  4. Step 4: Simplify right side
    13,143.42x = 130,140,235.07
  5. Step 5: Solve for x
    x = 130,140,235.07/13,143.42
  6. Step 6: Final answer
    x = 9,901.55

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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.