Home / 9,919.10-13,686.90-6,387.08

Finding the Fourth Proportional to 9,919.10, 13,686.90 and 6,387.08

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Solution

The fourth proportional to 9,919.10, 13,686.90 and 6,387.08 is: 8,813.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,919.10 : 13,686.90 = 6,387.08 : x
  2. Step 2: Convert to fraction form
    9,919.10/13,686.90 = 6,387.08/x
  3. Step 3: Cross multiply
    9,919.10x = 13,686.90 × 6,387.08
  4. Step 4: Simplify right side
    9,919.10x = 87,419,325.25
  5. Step 5: Solve for x
    x = 87,419,325.25/9,919.10
  6. Step 6: Final answer
    x = 8,813.23

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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.