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Finding the Fourth Proportional to 8,813.66, 12,160.95 and 5,085.50

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Solution

The fourth proportional to 8,813.66, 12,160.95 and 5,085.50 is: 7,016.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,813.66 : 12,160.95 = 5,085.50 : x
  2. Step 2: Convert to fraction form
    8,813.66/12,160.95 = 5,085.50/x
  3. Step 3: Cross multiply
    8,813.66x = 12,160.95 × 5,085.50
  4. Step 4: Simplify right side
    8,813.66x = 61,844,511.23
  5. Step 5: Solve for x
    x = 61,844,511.23/8,813.66
  6. Step 6: Final answer
    x = 7,016.89

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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.