Home / 6,909.76-10,364.59-1,979.40

Finding the Fourth Proportional to 6,909.76, 10,364.59 and 1,979.40

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Solution

The fourth proportional to 6,909.76, 10,364.59 and 1,979.40 is: 2,969.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,909.76 : 10,364.59 = 1,979.40 : x
  2. Step 2: Convert to fraction form
    6,909.76/10,364.59 = 1,979.40/x
  3. Step 3: Cross multiply
    6,909.76x = 10,364.59 × 1,979.40
  4. Step 4: Simplify right side
    6,909.76x = 20,515,659.55
  5. Step 5: Solve for x
    x = 20,515,659.55/6,909.76
  6. Step 6: Final answer
    x = 2,969.09

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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.