Home / 15,156.21-20,912.09-9,186.65

Finding the Fourth Proportional to 15,156.21, 20,912.09 and 9,186.65

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Solution

The fourth proportional to 15,156.21, 20,912.09 and 9,186.65 is: 12,675.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,156.21 : 20,912.09 = 9,186.65 : x
  2. Step 2: Convert to fraction form
    15,156.21/20,912.09 = 9,186.65/x
  3. Step 3: Cross multiply
    15,156.21x = 20,912.09 × 9,186.65
  4. Step 4: Simplify right side
    15,156.21x = 192,111,901.10
  5. Step 5: Solve for x
    x = 192,111,901.10/15,156.21
  6. Step 6: Final answer
    x = 12,675.46

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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.