Home / 20,638.72-28,482.39-11,685.04

Finding the Fourth Proportional to 20,638.72, 28,482.39 and 11,685.04

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Solution

The fourth proportional to 20,638.72, 28,482.39 and 11,685.04 is: 16,125.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.72 : 28,482.39 = 11,685.04 : x
  2. Step 2: Convert to fraction form
    20,638.72/28,482.39 = 11,685.04/x
  3. Step 3: Cross multiply
    20,638.72x = 28,482.39 × 11,685.04
  4. Step 4: Simplify right side
    20,638.72x = 332,817,866.45
  5. Step 5: Solve for x
    x = 332,817,866.45/20,638.72
  6. Step 6: Final answer
    x = 16,125.90

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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.