Home / 13,631.04-18,756.90-11,385.72

Finding the Fourth Proportional to 13,631.04, 18,756.90 and 11,385.72

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Solution

The fourth proportional to 13,631.04, 18,756.90 and 11,385.72 is: 15,667.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.04 : 18,756.90 = 11,385.72 : x
  2. Step 2: Convert to fraction form
    13,631.04/18,756.90 = 11,385.72/x
  3. Step 3: Cross multiply
    13,631.04x = 18,756.90 × 11,385.72
  4. Step 4: Simplify right side
    13,631.04x = 213,560,811.47
  5. Step 5: Solve for x
    x = 213,560,811.47/13,631.04
  6. Step 6: Final answer
    x = 15,667.24

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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.