Home / 13,141.07-18,134.74-7,172.88

Finding the Fourth Proportional to 13,141.07, 18,134.74 and 7,172.88

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Solution

The fourth proportional to 13,141.07, 18,134.74 and 7,172.88 is: 9,898.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.07 : 18,134.74 = 7,172.88 : x
  2. Step 2: Convert to fraction form
    13,141.07/18,134.74 = 7,172.88/x
  3. Step 3: Cross multiply
    13,141.07x = 18,134.74 × 7,172.88
  4. Step 4: Simplify right side
    13,141.07x = 130,078,313.85
  5. Step 5: Solve for x
    x = 130,078,313.85/13,141.07
  6. Step 6: Final answer
    x = 9,898.61

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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.