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Finding the Fourth Proportional to 14,008.80, 19,330.99 and 7,721.17

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Solution

The fourth proportional to 14,008.80, 19,330.99 and 7,721.17 is: 10,654.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,008.80 : 19,330.99 = 7,721.17 : x
  2. Step 2: Convert to fraction form
    14,008.80/19,330.99 = 7,721.17/x
  3. Step 3: Cross multiply
    14,008.80x = 19,330.99 × 7,721.17
  4. Step 4: Simplify right side
    14,008.80x = 149,257,860.06
  5. Step 5: Solve for x
    x = 149,257,860.06/14,008.80
  6. Step 6: Final answer
    x = 10,654.58

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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.