Home / 28,009.44-42,020.64-12,428.28

Finding the Fourth Proportional to 28,009.44, 42,020.64 and 12,428.28

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Solution

The fourth proportional to 28,009.44, 42,020.64 and 12,428.28 is: 18,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.44 : 42,020.64 = 12,428.28 : x
  2. Step 2: Convert to fraction form
    28,009.44/42,020.64 = 12,428.28/x
  3. Step 3: Cross multiply
    28,009.44x = 42,020.64 × 12,428.28
  4. Step 4: Simplify right side
    28,009.44x = 522,244,279.70
  5. Step 5: Solve for x
    x = 522,244,279.70/28,009.44
  6. Step 6: Final answer
    x = 18,645.30

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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.