Home / 28,438.64-42,623.38-20,121.06

Finding the Fourth Proportional to 28,438.64, 42,623.38 and 20,121.06

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Solution

The fourth proportional to 28,438.64, 42,623.38 and 20,121.06 is: 30,157.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,438.64 : 42,623.38 = 20,121.06 : x
  2. Step 2: Convert to fraction form
    28,438.64/42,623.38 = 20,121.06/x
  3. Step 3: Cross multiply
    28,438.64x = 42,623.38 × 20,121.06
  4. Step 4: Simplify right side
    28,438.64x = 857,627,446.73
  5. Step 5: Solve for x
    x = 857,627,446.73/28,438.64
  6. Step 6: Final answer
    x = 30,157.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.