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Finding the Fourth Proportional to 14,726.88, 20,315.88 and 8,756.64

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Solution

The fourth proportional to 14,726.88, 20,315.88 and 8,756.64 is: 12,079.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,726.88 : 20,315.88 = 8,756.64 : x
  2. Step 2: Convert to fraction form
    14,726.88/20,315.88 = 8,756.64/x
  3. Step 3: Cross multiply
    14,726.88x = 20,315.88 × 8,756.64
  4. Step 4: Simplify right side
    14,726.88x = 177,898,847.44
  5. Step 5: Solve for x
    x = 177,898,847.44/14,726.88
  6. Step 6: Final answer
    x = 12,079.87

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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.