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Finding the Fourth Proportional to 7,985.66, 11,019.90 and 4,448.78

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Solution

The fourth proportional to 7,985.66, 11,019.90 and 4,448.78 is: 6,139.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.66 : 11,019.90 = 4,448.78 : x
  2. Step 2: Convert to fraction form
    7,985.66/11,019.90 = 4,448.78/x
  3. Step 3: Cross multiply
    7,985.66x = 11,019.90 × 4,448.78
  4. Step 4: Simplify right side
    7,985.66x = 49,025,110.72
  5. Step 5: Solve for x
    x = 49,025,110.72/7,985.66
  6. Step 6: Final answer
    x = 6,139.14

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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.