Home / 13,145.06-18,140.09-7,176.72

Finding the Fourth Proportional to 13,145.06, 18,140.09 and 7,176.72

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Solution

The fourth proportional to 13,145.06, 18,140.09 and 7,176.72 is: 9,903.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.06 : 18,140.09 = 7,176.72 : x
  2. Step 2: Convert to fraction form
    13,145.06/18,140.09 = 7,176.72/x
  3. Step 3: Cross multiply
    13,145.06x = 18,140.09 × 7,176.72
  4. Step 4: Simplify right side
    13,145.06x = 130,186,310.82
  5. Step 5: Solve for x
    x = 130,186,310.82/13,145.06
  6. Step 6: Final answer
    x = 9,903.82

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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.