Home / 13,631.18-18,811.20-7,662.50

Finding the Fourth Proportional to 13,631.18, 18,811.20 and 7,662.50

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Solution

The fourth proportional to 13,631.18, 18,811.20 and 7,662.50 is: 10,574.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.18 : 18,811.20 = 7,662.50 : x
  2. Step 2: Convert to fraction form
    13,631.18/18,811.20 = 7,662.50/x
  3. Step 3: Cross multiply
    13,631.18x = 18,811.20 × 7,662.50
  4. Step 4: Simplify right side
    13,631.18x = 144,140,725.94
  5. Step 5: Solve for x
    x = 144,140,725.94/13,631.18
  6. Step 6: Final answer
    x = 10,574.34

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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.