Home / 7,909.35-11,864.61-2,978.07

Finding the Fourth Proportional to 7,909.35, 11,864.61 and 2,978.07

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Solution

The fourth proportional to 7,909.35, 11,864.61 and 2,978.07 is: 4,467.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.35 : 11,864.61 = 2,978.07 : x
  2. Step 2: Convert to fraction form
    7,909.35/11,864.61 = 2,978.07/x
  3. Step 3: Cross multiply
    7,909.35x = 11,864.61 × 2,978.07
  4. Step 4: Simplify right side
    7,909.35x = 35,333,639.10
  5. Step 5: Solve for x
    x = 35,333,639.10/7,909.35
  6. Step 6: Final answer
    x = 4,467.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.