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Finding the Fourth Proportional to 9,742.43, 13,444.47 and 7,620.12

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Solution

The fourth proportional to 9,742.43, 13,444.47 and 7,620.12 is: 10,515.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,742.43 : 13,444.47 = 7,620.12 : x
  2. Step 2: Convert to fraction form
    9,742.43/13,444.47 = 7,620.12/x
  3. Step 3: Cross multiply
    9,742.43x = 13,444.47 × 7,620.12
  4. Step 4: Simplify right side
    9,742.43x = 102,448,527.40
  5. Step 5: Solve for x
    x = 102,448,527.40/9,742.43
  6. Step 6: Final answer
    x = 10,515.71

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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.