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Finding the Fourth Proportional to 6,909.30, 10,363.95 and 1,978.83

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Solution

The fourth proportional to 6,909.30, 10,363.95 and 1,978.83 is: 2,968.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,909.30 : 10,363.95 = 1,978.83 : x
  2. Step 2: Convert to fraction form
    6,909.30/10,363.95 = 1,978.83/x
  3. Step 3: Cross multiply
    6,909.30x = 10,363.95 × 1,978.83
  4. Step 4: Simplify right side
    6,909.30x = 20,508,495.18
  5. Step 5: Solve for x
    x = 20,508,495.18/6,909.30
  6. Step 6: Final answer
    x = 2,968.25

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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.