Home / 9,815.04-13,456.32-9,640.32

Finding the Fourth Proportional to 9,815.04, 13,456.32 and 9,640.32

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Solution

The fourth proportional to 9,815.04, 13,456.32 and 9,640.32 is: 13,216.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,815.04 : 13,456.32 = 9,640.32 : x
  2. Step 2: Convert to fraction form
    9,815.04/13,456.32 = 9,640.32/x
  3. Step 3: Cross multiply
    9,815.04x = 13,456.32 × 9,640.32
  4. Step 4: Simplify right side
    9,815.04x = 129,723,230.82
  5. Step 5: Solve for x
    x = 129,723,230.82/9,815.04
  6. Step 6: Final answer
    x = 13,216.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.