Home / 13,285.74-18,341.82-8,815.50

Finding the Fourth Proportional to 13,285.74, 18,341.82 and 8,815.50

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Solution

The fourth proportional to 13,285.74, 18,341.82 and 8,815.50 is: 12,170.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,285.74 : 18,341.82 = 8,815.50 : x
  2. Step 2: Convert to fraction form
    13,285.74/18,341.82 = 8,815.50/x
  3. Step 3: Cross multiply
    13,285.74x = 18,341.82 × 8,815.50
  4. Step 4: Simplify right side
    13,285.74x = 161,692,314.21
  5. Step 5: Solve for x
    x = 161,692,314.21/13,285.74
  6. Step 6: Final answer
    x = 12,170.37

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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.