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Finding the Fourth Proportional to 12,368.70, 18,567.45 and 7,443.90

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Solution

The fourth proportional to 12,368.70, 18,567.45 and 7,443.90 is: 11,174.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,368.70 : 18,567.45 = 7,443.90 : x
  2. Step 2: Convert to fraction form
    12,368.70/18,567.45 = 7,443.90/x
  3. Step 3: Cross multiply
    12,368.70x = 18,567.45 × 7,443.90
  4. Step 4: Simplify right side
    12,368.70x = 138,214,241.06
  5. Step 5: Solve for x
    x = 138,214,241.06/12,368.70
  6. Step 6: Final answer
    x = 11,174.52

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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.