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Finding the Fourth Proportional to 9,918.15, 13,687.04 and 5,441.92

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Solution

The fourth proportional to 9,918.15, 13,687.04 and 5,441.92 is: 7,509.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,918.15 : 13,687.04 = 5,441.92 : x
  2. Step 2: Convert to fraction form
    9,918.15/13,687.04 = 5,441.92/x
  3. Step 3: Cross multiply
    9,918.15x = 13,687.04 × 5,441.92
  4. Step 4: Simplify right side
    9,918.15x = 74,483,756.10
  5. Step 5: Solve for x
    x = 74,483,756.10/9,918.15
  6. Step 6: Final answer
    x = 7,509.85

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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.