Home / 12,581.76-18,868.80-8,222.40

Finding the Fourth Proportional to 12,581.76, 18,868.80 and 8,222.40

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Solution

The fourth proportional to 12,581.76, 18,868.80 and 8,222.40 is: 12,331.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,581.76 : 18,868.80 = 8,222.40 : x
  2. Step 2: Convert to fraction form
    12,581.76/18,868.80 = 8,222.40/x
  3. Step 3: Cross multiply
    12,581.76x = 18,868.80 × 8,222.40
  4. Step 4: Simplify right side
    12,581.76x = 155,146,821.12
  5. Step 5: Solve for x
    x = 155,146,821.12/12,581.76
  6. Step 6: Final answer
    x = 12,331.09

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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.