Home / 12,631.34-18,947.80-5,236.38

Finding the Fourth Proportional to 12,631.34, 18,947.80 and 5,236.38

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Solution

The fourth proportional to 12,631.34, 18,947.80 and 5,236.38 is: 7,854.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.34 : 18,947.80 = 5,236.38 : x
  2. Step 2: Convert to fraction form
    12,631.34/18,947.80 = 5,236.38/x
  3. Step 3: Cross multiply
    12,631.34x = 18,947.80 × 5,236.38
  4. Step 4: Simplify right side
    12,631.34x = 99,217,880.96
  5. Step 5: Solve for x
    x = 99,217,880.96/12,631.34
  6. Step 6: Final answer
    x = 7,854.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.