Home / 20,555.51-28,367.12-11,603.84

Finding the Fourth Proportional to 20,555.51, 28,367.12 and 11,603.84

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Solution

The fourth proportional to 20,555.51, 28,367.12 and 11,603.84 is: 16,013.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.51 : 28,367.12 = 11,603.84 : x
  2. Step 2: Convert to fraction form
    20,555.51/28,367.12 = 11,603.84/x
  3. Step 3: Cross multiply
    20,555.51x = 28,367.12 × 11,603.84
  4. Step 4: Simplify right side
    20,555.51x = 329,167,408.91
  5. Step 5: Solve for x
    x = 329,167,408.91/20,555.51
  6. Step 6: Final answer
    x = 16,013.59

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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.