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Finding the Fourth Proportional to 9,918.99, 13,687.99 and 6,382.19

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Solution

The fourth proportional to 9,918.99, 13,687.99 and 6,382.19 is: 8,807.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.99 : 13,687.99 = 6,382.19 : x
  2. Step 2: Convert to fraction form
    9,918.99/13,687.99 = 6,382.19/x
  3. Step 3: Cross multiply
    9,918.99x = 13,687.99 × 6,382.19
  4. Step 4: Simplify right side
    9,918.99x = 87,359,371.16
  5. Step 5: Solve for x
    x = 87,359,371.16/9,918.99
  6. Step 6: Final answer
    x = 8,807.28

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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.