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Finding the Fourth Proportional to 19,909.81, 27,474.95 and 10,957.31

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Solution

The fourth proportional to 19,909.81, 27,474.95 and 10,957.31 is: 15,120.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,909.81 : 27,474.95 = 10,957.31 : x
  2. Step 2: Convert to fraction form
    19,909.81/27,474.95 = 10,957.31/x
  3. Step 3: Cross multiply
    19,909.81x = 27,474.95 × 10,957.31
  4. Step 4: Simplify right side
    19,909.81x = 301,051,544.38
  5. Step 5: Solve for x
    x = 301,051,544.38/19,909.81
  6. Step 6: Final answer
    x = 15,120.76

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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.