Home / 7,917.20-11,875.98-2,074.40

Finding the Fourth Proportional to 7,917.20, 11,875.98 and 2,074.40

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Solution

The fourth proportional to 7,917.20, 11,875.98 and 2,074.40 is: 3,111.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.20 : 11,875.98 = 2,074.40 : x
  2. Step 2: Convert to fraction form
    7,917.20/11,875.98 = 2,074.40/x
  3. Step 3: Cross multiply
    7,917.20x = 11,875.98 × 2,074.40
  4. Step 4: Simplify right side
    7,917.20x = 24,635,532.91
  5. Step 5: Solve for x
    x = 24,635,532.91/7,917.20
  6. Step 6: Final answer
    x = 3,111.65

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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.