Home / 42,039.88-63,072-12,458.28

Finding the Fourth Proportional to 42,039.88, 63,072 and 12,458.28

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Solution

The fourth proportional to 42,039.88, 63,072 and 12,458.28 is: 18,691.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,039.88 : 63,072 = 12,458.28 : x
  2. Step 2: Convert to fraction form
    42,039.88/63,072 = 12,458.28/x
  3. Step 3: Cross multiply
    42,039.88x = 63,072 × 12,458.28
  4. Step 4: Simplify right side
    42,039.88x = 785,768,636.16
  5. Step 5: Solve for x
    x = 785,768,636.16/42,039.88
  6. Step 6: Final answer
    x = 18,691.03

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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.