Home / 30,681.48-45,991.20-11,949.84

Finding the Fourth Proportional to 30,681.48, 45,991.20 and 11,949.84

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Solution

The fourth proportional to 30,681.48, 45,991.20 and 11,949.84 is: 17,912.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,681.48 : 45,991.20 = 11,949.84 : x
  2. Step 2: Convert to fraction form
    30,681.48/45,991.20 = 11,949.84/x
  3. Step 3: Cross multiply
    30,681.48x = 45,991.20 × 11,949.84
  4. Step 4: Simplify right side
    30,681.48x = 549,587,481.41
  5. Step 5: Solve for x
    x = 549,587,481.41/30,681.48
  6. Step 6: Final answer
    x = 17,912.68

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1.5x scale

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.