Home / 13,143.94-18,138.70-7,175.76

Finding the Fourth Proportional to 13,143.94, 18,138.70 and 7,175.76

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Solution

The fourth proportional to 13,143.94, 18,138.70 and 7,175.76 is: 9,902.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.94 : 18,138.70 = 7,175.76 : x
  2. Step 2: Convert to fraction form
    13,143.94/18,138.70 = 7,175.76/x
  3. Step 3: Cross multiply
    13,143.94x = 18,138.70 × 7,175.76
  4. Step 4: Simplify right side
    13,143.94x = 130,158,957.91
  5. Step 5: Solve for x
    x = 130,158,957.91/13,143.94
  6. Step 6: Final answer
    x = 9,902.58

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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.