Home / 9,918.10-13,685.50-6,386.10

Finding the Fourth Proportional to 9,918.10, 13,685.50 and 6,386.10

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Solution

The fourth proportional to 9,918.10, 13,685.50 and 6,386.10 is: 8,811.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.10 : 13,685.50 = 6,386.10 : x
  2. Step 2: Convert to fraction form
    9,918.10/13,685.50 = 6,386.10/x
  3. Step 3: Cross multiply
    9,918.10x = 13,685.50 × 6,386.10
  4. Step 4: Simplify right side
    9,918.10x = 87,396,971.55
  5. Step 5: Solve for x
    x = 87,396,971.55/9,918.10
  6. Step 6: Final answer
    x = 8,811.87

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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.