Home / 15,153.08-20,912.19-8,439.80

Finding the Fourth Proportional to 15,153.08, 20,912.19 and 8,439.80

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Solution

The fourth proportional to 15,153.08, 20,912.19 and 8,439.80 is: 11,647.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,153.08 : 20,912.19 = 8,439.80 : x
  2. Step 2: Convert to fraction form
    15,153.08/20,912.19 = 8,439.80/x
  3. Step 3: Cross multiply
    15,153.08x = 20,912.19 × 8,439.80
  4. Step 4: Simplify right side
    15,153.08x = 176,494,701.16
  5. Step 5: Solve for x
    x = 176,494,701.16/15,153.08
  6. Step 6: Final answer
    x = 11,647.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.