Home / 20,815.47-28,725.35-11,384.03

Finding the Fourth Proportional to 20,815.47, 28,725.35 and 11,384.03

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Solution

The fourth proportional to 20,815.47, 28,725.35 and 11,384.03 is: 15,709.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.47 : 28,725.35 = 11,384.03 : x
  2. Step 2: Convert to fraction form
    20,815.47/28,725.35 = 11,384.03/x
  3. Step 3: Cross multiply
    20,815.47x = 28,725.35 × 11,384.03
  4. Step 4: Simplify right side
    20,815.47x = 327,010,246.16
  5. Step 5: Solve for x
    x = 327,010,246.16/20,815.47
  6. Step 6: Final answer
    x = 15,709.96

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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.