Home / 12,813.80-19,220.70-8,436.20

Finding the Fourth Proportional to 12,813.80, 19,220.70 and 8,436.20

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Solution

The fourth proportional to 12,813.80, 19,220.70 and 8,436.20 is: 12,654.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,813.80 : 19,220.70 = 8,436.20 : x
  2. Step 2: Convert to fraction form
    12,813.80/19,220.70 = 8,436.20/x
  3. Step 3: Cross multiply
    12,813.80x = 19,220.70 × 8,436.20
  4. Step 4: Simplify right side
    12,813.80x = 162,149,669.34
  5. Step 5: Solve for x
    x = 162,149,669.34/12,813.80
  6. Step 6: Final answer
    x = 12,654.30

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Double scale
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Similar ratio
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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.