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Finding the Fourth Proportional to 14,072.96, 19,419.88 and 7,784.96

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Solution

The fourth proportional to 14,072.96, 19,419.88 and 7,784.96 is: 10,742.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,072.96 : 19,419.88 = 7,784.96 : x
  2. Step 2: Convert to fraction form
    14,072.96/19,419.88 = 7,784.96/x
  3. Step 3: Cross multiply
    14,072.96x = 19,419.88 × 7,784.96
  4. Step 4: Simplify right side
    14,072.96x = 151,182,989.00
  5. Step 5: Solve for x
    x = 151,182,989.00/14,072.96
  6. Step 6: Final answer
    x = 10,742.80

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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.