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Finding the Fourth Proportional to 6,618.45, 9,931.32 and 4,431.45

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Solution

The fourth proportional to 6,618.45, 9,931.32 and 4,431.45 is: 6,649.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,618.45 : 9,931.32 = 4,431.45 : x
  2. Step 2: Convert to fraction form
    6,618.45/9,931.32 = 4,431.45/x
  3. Step 3: Cross multiply
    6,618.45x = 9,931.32 × 4,431.45
  4. Step 4: Simplify right side
    6,618.45x = 44,010,148.01
  5. Step 5: Solve for x
    x = 44,010,148.01/6,618.45
  6. Step 6: Final answer
    x = 6,649.62

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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.