Home / 42,020.24-63,039.32-20,971.60

Finding the Fourth Proportional to 42,020.24, 63,039.32 and 20,971.60

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Solution

The fourth proportional to 42,020.24, 63,039.32 and 20,971.60 is: 31,461.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,020.24 : 63,039.32 = 20,971.60 : x
  2. Step 2: Convert to fraction form
    42,020.24/63,039.32 = 20,971.60/x
  3. Step 3: Cross multiply
    42,020.24x = 63,039.32 × 20,971.60
  4. Step 4: Simplify right side
    42,020.24x = 1,322,035,403.31
  5. Step 5: Solve for x
    x = 1,322,035,403.31/42,020.24
  6. Step 6: Final answer
    x = 31,461.87

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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.