Home / 42,621.80-63,930.40-13,039.64

Finding the Fourth Proportional to 42,621.80, 63,930.40 and 13,039.64

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Solution

The fourth proportional to 42,621.80, 63,930.40 and 13,039.64 is: 19,558.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,621.80 : 63,930.40 = 13,039.64 : x
  2. Step 2: Convert to fraction form
    42,621.80/63,930.40 = 13,039.64/x
  3. Step 3: Cross multiply
    42,621.80x = 63,930.40 × 13,039.64
  4. Step 4: Simplify right side
    42,621.80x = 833,629,401.06
  5. Step 5: Solve for x
    x = 833,629,401.06/42,621.80
  6. Step 6: Final answer
    x = 19,558.76

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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.