Home / 19,885.40-27,440.20-11,707.69

Finding the Fourth Proportional to 19,885.40, 27,440.20 and 11,707.69

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Solution

The fourth proportional to 19,885.40, 27,440.20 and 11,707.69 is: 16,155.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,885.40 : 27,440.20 = 11,707.69 : x
  2. Step 2: Convert to fraction form
    19,885.40/27,440.20 = 11,707.69/x
  3. Step 3: Cross multiply
    19,885.40x = 27,440.20 × 11,707.69
  4. Step 4: Simplify right side
    19,885.40x = 321,261,352.62
  5. Step 5: Solve for x
    x = 321,261,352.62/19,885.40
  6. Step 6: Final answer
    x = 16,155.64

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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.