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Finding the Fourth Proportional to 14,090.88, 19,412.72 and 11,728.88

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Solution

The fourth proportional to 14,090.88, 19,412.72 and 11,728.88 is: 16,158.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,090.88 : 19,412.72 = 11,728.88 : x
  2. Step 2: Convert to fraction form
    14,090.88/19,412.72 = 11,728.88/x
  3. Step 3: Cross multiply
    14,090.88x = 19,412.72 × 11,728.88
  4. Step 4: Simplify right side
    14,090.88x = 227,689,463.35
  5. Step 5: Solve for x
    x = 227,689,463.35/14,090.88
  6. Step 6: Final answer
    x = 16,158.64

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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.