Home / 12,265.40-18,379.20-9,130.70

Finding the Fourth Proportional to 12,265.40, 18,379.20 and 9,130.70

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Solution

The fourth proportional to 12,265.40, 18,379.20 and 9,130.70 is: 13,681.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,265.40 : 18,379.20 = 9,130.70 : x
  2. Step 2: Convert to fraction form
    12,265.40/18,379.20 = 9,130.70/x
  3. Step 3: Cross multiply
    12,265.40x = 18,379.20 × 9,130.70
  4. Step 4: Simplify right side
    12,265.40x = 167,814,961.44
  5. Step 5: Solve for x
    x = 167,814,961.44/12,265.40
  6. Step 6: Final answer
    x = 13,681.98

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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.