Home / 15,204.40-20,982.08-8,916.80

Finding the Fourth Proportional to 15,204.40, 20,982.08 and 8,916.80

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Solution

The fourth proportional to 15,204.40, 20,982.08 and 8,916.80 is: 12,305.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,204.40 : 20,982.08 = 8,916.80 : x
  2. Step 2: Convert to fraction form
    15,204.40/20,982.08 = 8,916.80/x
  3. Step 3: Cross multiply
    15,204.40x = 20,982.08 × 8,916.80
  4. Step 4: Simplify right side
    15,204.40x = 187,093,010.94
  5. Step 5: Solve for x
    x = 187,093,010.94/15,204.40
  6. Step 6: Final answer
    x = 12,305.19

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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.