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Finding the Fourth Proportional to 17,766.40, 26,649.60 and 12,776.80

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Solution

The fourth proportional to 17,766.40, 26,649.60 and 12,776.80 is: 19,165.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,766.40 : 26,649.60 = 12,776.80 : x
  2. Step 2: Convert to fraction form
    17,766.40/26,649.60 = 12,776.80/x
  3. Step 3: Cross multiply
    17,766.40x = 26,649.60 × 12,776.80
  4. Step 4: Simplify right side
    17,766.40x = 340,496,609.28
  5. Step 5: Solve for x
    x = 340,496,609.28/17,766.40
  6. Step 6: Final answer
    x = 19,165.20

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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.