Home / 11,150.12-15,387.16-6,434.40

Finding the Fourth Proportional to 11,150.12, 15,387.16 and 6,434.40

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Solution

The fourth proportional to 11,150.12, 15,387.16 and 6,434.40 is: 8,879.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,150.12 : 15,387.16 = 6,434.40 : x
  2. Step 2: Convert to fraction form
    11,150.12/15,387.16 = 6,434.40/x
  3. Step 3: Cross multiply
    11,150.12x = 15,387.16 × 6,434.40
  4. Step 4: Simplify right side
    11,150.12x = 99,007,142.30
  5. Step 5: Solve for x
    x = 99,007,142.30/11,150.12
  6. Step 6: Final answer
    x = 8,879.47

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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.