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Finding the Fourth Proportional to 9,938.88, 13,709.34 and 7,418.28

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Solution

The fourth proportional to 9,938.88, 13,709.34 and 7,418.28 is: 10,232.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,938.88 : 13,709.34 = 7,418.28 : x
  2. Step 2: Convert to fraction form
    9,938.88/13,709.34 = 7,418.28/x
  3. Step 3: Cross multiply
    9,938.88x = 13,709.34 × 7,418.28
  4. Step 4: Simplify right side
    9,938.88x = 101,699,722.74
  5. Step 5: Solve for x
    x = 101,699,722.74/9,938.88
  6. Step 6: Final answer
    x = 10,232.51

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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.