Home / 19,869.81-27,422.96-12,816.73

Finding the Fourth Proportional to 19,869.81, 27,422.96 and 12,816.73

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Solution

The fourth proportional to 19,869.81, 27,422.96 and 12,816.73 is: 17,688.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,869.81 : 27,422.96 = 12,816.73 : x
  2. Step 2: Convert to fraction form
    19,869.81/27,422.96 = 12,816.73/x
  3. Step 3: Cross multiply
    19,869.81x = 27,422.96 × 12,816.73
  4. Step 4: Simplify right side
    19,869.81x = 351,472,674.12
  5. Step 5: Solve for x
    x = 351,472,674.12/19,869.81
  6. Step 6: Final answer
    x = 17,688.78

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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.