Home / 13,615.40-20,423.10-8,949.80

Finding the Fourth Proportional to 13,615.40, 20,423.10 and 8,949.80

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Solution

The fourth proportional to 13,615.40, 20,423.10 and 8,949.80 is: 13,424.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.40 : 20,423.10 = 8,949.80 : x
  2. Step 2: Convert to fraction form
    13,615.40/20,423.10 = 8,949.80/x
  3. Step 3: Cross multiply
    13,615.40x = 20,423.10 × 8,949.80
  4. Step 4: Simplify right side
    13,615.40x = 182,782,660.38
  5. Step 5: Solve for x
    x = 182,782,660.38/13,615.40
  6. Step 6: Final answer
    x = 13,424.70

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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.