Home / 12,885.12-19,328.76-4,119.84

Finding the Fourth Proportional to 12,885.12, 19,328.76 and 4,119.84

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Solution

The fourth proportional to 12,885.12, 19,328.76 and 4,119.84 is: 6,180.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,885.12 : 19,328.76 = 4,119.84 : x
  2. Step 2: Convert to fraction form
    12,885.12/19,328.76 = 4,119.84/x
  3. Step 3: Cross multiply
    12,885.12x = 19,328.76 × 4,119.84
  4. Step 4: Simplify right side
    12,885.12x = 79,631,398.60
  5. Step 5: Solve for x
    x = 79,631,398.60/12,885.12
  6. Step 6: Final answer
    x = 6,180.11

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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.