Home / 12,817.36-17,683.20-8,628.40

Finding the Fourth Proportional to 12,817.36, 17,683.20 and 8,628.40

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Solution

The fourth proportional to 12,817.36, 17,683.20 and 8,628.40 is: 11,903.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,817.36 : 17,683.20 = 8,628.40 : x
  2. Step 2: Convert to fraction form
    12,817.36/17,683.20 = 8,628.40/x
  3. Step 3: Cross multiply
    12,817.36x = 17,683.20 × 8,628.40
  4. Step 4: Simplify right side
    12,817.36x = 152,577,722.88
  5. Step 5: Solve for x
    x = 152,577,722.88/12,817.36
  6. Step 6: Final answer
    x = 11,903.99

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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.