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Finding the Fourth Proportional to 7,998.78, 11,038.21 and 4,642.17

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Solution

The fourth proportional to 7,998.78, 11,038.21 and 4,642.17 is: 6,406.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.78 : 11,038.21 = 4,642.17 : x
  2. Step 2: Convert to fraction form
    7,998.78/11,038.21 = 4,642.17/x
  3. Step 3: Cross multiply
    7,998.78x = 11,038.21 × 4,642.17
  4. Step 4: Simplify right side
    7,998.78x = 51,241,247.32
  5. Step 5: Solve for x
    x = 51,241,247.32/7,998.78
  6. Step 6: Final answer
    x = 6,406.13

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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.