Home / 20,638.62-28,480.32-11,206.98

Finding the Fourth Proportional to 20,638.62, 28,480.32 and 11,206.98

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Solution

The fourth proportional to 20,638.62, 28,480.32 and 11,206.98 is: 15,465.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.62 : 28,480.32 = 11,206.98 : x
  2. Step 2: Convert to fraction form
    20,638.62/28,480.32 = 11,206.98/x
  3. Step 3: Cross multiply
    20,638.62x = 28,480.32 × 11,206.98
  4. Step 4: Simplify right side
    20,638.62x = 319,178,376.63
  5. Step 5: Solve for x
    x = 319,178,376.63/20,638.62
  6. Step 6: Final answer
    x = 15,465.10

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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.