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Finding the Fourth Proportional to 12,805.40, 19,218.90 and 6,237.20

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Solution

The fourth proportional to 12,805.40, 19,218.90 and 6,237.20 is: 9,361.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,805.40 : 19,218.90 = 6,237.20 : x
  2. Step 2: Convert to fraction form
    12,805.40/19,218.90 = 6,237.20/x
  3. Step 3: Cross multiply
    12,805.40x = 19,218.90 × 6,237.20
  4. Step 4: Simplify right side
    12,805.40x = 119,872,123.08
  5. Step 5: Solve for x
    x = 119,872,123.08/12,805.40
  6. Step 6: Final answer
    x = 9,361.06

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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.