Home / 42,621.23-63,918.01-20,128.43

Finding the Fourth Proportional to 42,621.23, 63,918.01 and 20,128.43

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Solution

The fourth proportional to 42,621.23, 63,918.01 and 20,128.43 is: 30,186.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,621.23 : 63,918.01 = 20,128.43 : x
  2. Step 2: Convert to fraction form
    42,621.23/63,918.01 = 20,128.43/x
  3. Step 3: Cross multiply
    42,621.23x = 63,918.01 × 20,128.43
  4. Step 4: Simplify right side
    42,621.23x = 1,286,569,190.02
  5. Step 5: Solve for x
    x = 1,286,569,190.02/42,621.23
  6. Step 6: Final answer
    x = 30,186.11

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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.