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Finding the Fourth Proportional to 14,778.65, 20,394.38 and 8,064.29

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Solution

The fourth proportional to 14,778.65, 20,394.38 and 8,064.29 is: 11,128.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.65 : 20,394.38 = 8,064.29 : x
  2. Step 2: Convert to fraction form
    14,778.65/20,394.38 = 8,064.29/x
  3. Step 3: Cross multiply
    14,778.65x = 20,394.38 × 8,064.29
  4. Step 4: Simplify right side
    14,778.65x = 164,466,052.40
  5. Step 5: Solve for x
    x = 164,466,052.40/14,778.65
  6. Step 6: Final answer
    x = 11,128.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.