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Finding the Fourth Proportional to 14,796.80, 20,405.76 and 11,029.28

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Solution

The fourth proportional to 14,796.80, 20,405.76 and 11,029.28 is: 15,210.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,796.80 : 20,405.76 = 11,029.28 : x
  2. Step 2: Convert to fraction form
    14,796.80/20,405.76 = 11,029.28/x
  3. Step 3: Cross multiply
    14,796.80x = 20,405.76 × 11,029.28
  4. Step 4: Simplify right side
    14,796.80x = 225,060,840.65
  5. Step 5: Solve for x
    x = 225,060,840.65/14,796.80
  6. Step 6: Final answer
    x = 15,210.10

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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.