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Finding the Fourth Proportional to 14,178.84, 21,270.99 and 7,945.89

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Solution

The fourth proportional to 14,178.84, 21,270.99 and 7,945.89 is: 11,920.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,178.84 : 21,270.99 = 7,945.89 : x
  2. Step 2: Convert to fraction form
    14,178.84/21,270.99 = 7,945.89/x
  3. Step 3: Cross multiply
    14,178.84x = 21,270.99 × 7,945.89
  4. Step 4: Simplify right side
    14,178.84x = 169,016,946.73
  5. Step 5: Solve for x
    x = 169,016,946.73/14,178.84
  6. Step 6: Final answer
    x = 11,920.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.