Home / 19,869.84-27,421.92-11,912.40

Finding the Fourth Proportional to 19,869.84, 27,421.92 and 11,912.40

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Solution

The fourth proportional to 19,869.84, 27,421.92 and 11,912.40 is: 16,440.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,869.84 : 27,421.92 = 11,912.40 : x
  2. Step 2: Convert to fraction form
    19,869.84/27,421.92 = 11,912.40/x
  3. Step 3: Cross multiply
    19,869.84x = 27,421.92 × 11,912.40
  4. Step 4: Simplify right side
    19,869.84x = 326,660,879.81
  5. Step 5: Solve for x
    x = 326,660,879.81/19,869.84
  6. Step 6: Final answer
    x = 16,440.04

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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.