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Finding the Fourth Proportional to 9,914, 13,678.96 and 5,722.32

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Solution

The fourth proportional to 9,914, 13,678.96 and 5,722.32 is: 7,895.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,914 : 13,678.96 = 5,722.32 : x
  2. Step 2: Convert to fraction form
    9,914/13,678.96 = 5,722.32/x
  3. Step 3: Cross multiply
    9,914x = 13,678.96 × 5,722.32
  4. Step 4: Simplify right side
    9,914x = 78,275,386.39
  5. Step 5: Solve for x
    x = 78,275,386.39/9,914
  6. Step 6: Final answer
    x = 7,895.44

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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.