Home / 13,622.78-18,800.80-9,155.84

Finding the Fourth Proportional to 13,622.78, 18,800.80 and 9,155.84

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Solution

The fourth proportional to 13,622.78, 18,800.80 and 9,155.84 is: 12,635.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,622.78 : 18,800.80 = 9,155.84 : x
  2. Step 2: Convert to fraction form
    13,622.78/18,800.80 = 9,155.84/x
  3. Step 3: Cross multiply
    13,622.78x = 18,800.80 × 9,155.84
  4. Step 4: Simplify right side
    13,622.78x = 172,137,116.67
  5. Step 5: Solve for x
    x = 172,137,116.67/13,622.78
  6. Step 6: Final answer
    x = 12,635.98

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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.