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Finding the Fourth Proportional to 42,604.88, 63,888.66 and 13,015.88

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Solution

The fourth proportional to 42,604.88, 63,888.66 and 13,015.88 is: 19,518.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,604.88 : 63,888.66 = 13,015.88 : x
  2. Step 2: Convert to fraction form
    42,604.88/63,888.66 = 13,015.88/x
  3. Step 3: Cross multiply
    42,604.88x = 63,888.66 × 13,015.88
  4. Step 4: Simplify right side
    42,604.88x = 831,567,131.92
  5. Step 5: Solve for x
    x = 831,567,131.92/42,604.88
  6. Step 6: Final answer
    x = 19,518.12

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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.