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Finding the Fourth Proportional to 14,963.81, 20,649.88 and 8,590.55

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Solution

The fourth proportional to 14,963.81, 20,649.88 and 8,590.55 is: 11,854.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,963.81 : 20,649.88 = 8,590.55 : x
  2. Step 2: Convert to fraction form
    14,963.81/20,649.88 = 8,590.55/x
  3. Step 3: Cross multiply
    14,963.81x = 20,649.88 × 8,590.55
  4. Step 4: Simplify right side
    14,963.81x = 177,393,796.49
  5. Step 5: Solve for x
    x = 177,393,796.49/14,963.81
  6. Step 6: Final answer
    x = 11,854.86

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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.