Home / 13,687.20-18,925.20-11,937.60

Finding the Fourth Proportional to 13,687.20, 18,925.20 and 11,937.60

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Solution

The fourth proportional to 13,687.20, 18,925.20 and 11,937.60 is: 16,506.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.20 : 18,925.20 = 11,937.60 : x
  2. Step 2: Convert to fraction form
    13,687.20/18,925.20 = 11,937.60/x
  3. Step 3: Cross multiply
    13,687.20x = 18,925.20 × 11,937.60
  4. Step 4: Simplify right side
    13,687.20x = 225,921,467.52
  5. Step 5: Solve for x
    x = 225,921,467.52/13,687.20
  6. Step 6: Final answer
    x = 16,506.04

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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.