Home / 12,218.40-18,294.32-8,512.80

Finding the Fourth Proportional to 12,218.40, 18,294.32 and 8,512.80

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Solution

The fourth proportional to 12,218.40, 18,294.32 and 8,512.80 is: 12,746.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.40 : 18,294.32 = 8,512.80 : x
  2. Step 2: Convert to fraction form
    12,218.40/18,294.32 = 8,512.80/x
  3. Step 3: Cross multiply
    12,218.40x = 18,294.32 × 8,512.80
  4. Step 4: Simplify right side
    12,218.40x = 155,735,887.30
  5. Step 5: Solve for x
    x = 155,735,887.30/12,218.40
  6. Step 6: Final answer
    x = 12,746.01

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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.