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Finding the Fourth Proportional to 11,865.50, 16,382 and 7,618.38

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Solution

The fourth proportional to 11,865.50, 16,382 and 7,618.38 is: 10,518.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,865.50 : 16,382 = 7,618.38 : x
  2. Step 2: Convert to fraction form
    11,865.50/16,382 = 7,618.38/x
  3. Step 3: Cross multiply
    11,865.50x = 16,382 × 7,618.38
  4. Step 4: Simplify right side
    11,865.50x = 124,804,301.16
  5. Step 5: Solve for x
    x = 124,804,301.16/11,865.50
  6. Step 6: Final answer
    x = 10,518.25

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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.