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Finding the Fourth Proportional to 6,919.99, 9,530.31 and 6,475.30

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Solution

The fourth proportional to 6,919.99, 9,530.31 and 6,475.30 is: 8,917.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,919.99 : 9,530.31 = 6,475.30 : x
  2. Step 2: Convert to fraction form
    6,919.99/9,530.31 = 6,475.30/x
  3. Step 3: Cross multiply
    6,919.99x = 9,530.31 × 6,475.30
  4. Step 4: Simplify right side
    6,919.99x = 61,711,616.34
  5. Step 5: Solve for x
    x = 61,711,616.34/6,919.99
  6. Step 6: Final answer
    x = 8,917.88

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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.