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Finding the Fourth Proportional to 7,911.08, 10,917.08 and 4,374.20

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Solution

The fourth proportional to 7,911.08, 10,917.08 and 4,374.20 is: 6,036.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.08 : 10,917.08 = 4,374.20 : x
  2. Step 2: Convert to fraction form
    7,911.08/10,917.08 = 4,374.20/x
  3. Step 3: Cross multiply
    7,911.08x = 10,917.08 × 4,374.20
  4. Step 4: Simplify right side
    7,911.08x = 47,753,491.34
  5. Step 5: Solve for x
    x = 47,753,491.34/7,911.08
  6. Step 6: Final answer
    x = 6,036.28

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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.