Home / 42,986.48-64,486.20-15,278

Finding the Fourth Proportional to 42,986.48, 64,486.20 and 15,278

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Solution

The fourth proportional to 42,986.48, 64,486.20 and 15,278 is: 22,919.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,986.48 : 64,486.20 = 15,278 : x
  2. Step 2: Convert to fraction form
    42,986.48/64,486.20 = 15,278/x
  3. Step 3: Cross multiply
    42,986.48x = 64,486.20 × 15,278
  4. Step 4: Simplify right side
    42,986.48x = 985,220,163.60
  5. Step 5: Solve for x
    x = 985,220,163.60/42,986.48
  6. Step 6: Final answer
    x = 22,919.30

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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.