Home / 13,391.88-18,471.60-9,192.84

Finding the Fourth Proportional to 13,391.88, 18,471.60 and 9,192.84

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Solution

The fourth proportional to 13,391.88, 18,471.60 and 9,192.84 is: 12,679.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.88 : 18,471.60 = 9,192.84 : x
  2. Step 2: Convert to fraction form
    13,391.88/18,471.60 = 9,192.84/x
  3. Step 3: Cross multiply
    13,391.88x = 18,471.60 × 9,192.84
  4. Step 4: Simplify right side
    13,391.88x = 169,806,463.34
  5. Step 5: Solve for x
    x = 169,806,463.34/13,391.88
  6. Step 6: Final answer
    x = 12,679.81

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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.