Home / 20,428.32-30,664.08-10,047.36

Finding the Fourth Proportional to 20,428.32, 30,664.08 and 10,047.36

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Solution

The fourth proportional to 20,428.32, 30,664.08 and 10,047.36 is: 15,081.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.32 : 30,664.08 = 10,047.36 : x
  2. Step 2: Convert to fraction form
    20,428.32/30,664.08 = 10,047.36/x
  3. Step 3: Cross multiply
    20,428.32x = 30,664.08 × 10,047.36
  4. Step 4: Simplify right side
    20,428.32x = 308,093,050.83
  5. Step 5: Solve for x
    x = 308,093,050.83/20,428.32
  6. Step 6: Final answer
    x = 15,081.66

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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.