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Finding the Fourth Proportional to 9,918.01, 13,689.90 and 6,381.22

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Solution

The fourth proportional to 9,918.01, 13,689.90 and 6,381.22 is: 8,808.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.01 : 13,689.90 = 6,381.22 : x
  2. Step 2: Convert to fraction form
    9,918.01/13,689.90 = 6,381.22/x
  3. Step 3: Cross multiply
    9,918.01x = 13,689.90 × 6,381.22
  4. Step 4: Simplify right side
    9,918.01x = 87,358,263.68
  5. Step 5: Solve for x
    x = 87,358,263.68/9,918.01
  6. Step 6: Final answer
    x = 8,808.04

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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.