Home / 42,558.78-63,847.32-21,223.12

Finding the Fourth Proportional to 42,558.78, 63,847.32 and 21,223.12

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Solution

The fourth proportional to 42,558.78, 63,847.32 and 21,223.12 is: 31,839.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,558.78 : 63,847.32 = 21,223.12 : x
  2. Step 2: Convert to fraction form
    42,558.78/63,847.32 = 21,223.12/x
  3. Step 3: Cross multiply
    42,558.78x = 63,847.32 × 21,223.12
  4. Step 4: Simplify right side
    42,558.78x = 1,355,039,334.04
  5. Step 5: Solve for x
    x = 1,355,039,334.04/42,558.78
  6. Step 6: Final answer
    x = 31,839.24

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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.