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Finding the Fourth Proportional to 9,999.76, 13,797.12 and 6,807.28

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Solution

The fourth proportional to 9,999.76, 13,797.12 and 6,807.28 is: 9,392.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,999.76 : 13,797.12 = 6,807.28 : x
  2. Step 2: Convert to fraction form
    9,999.76/13,797.12 = 6,807.28/x
  3. Step 3: Cross multiply
    9,999.76x = 13,797.12 × 6,807.28
  4. Step 4: Simplify right side
    9,999.76x = 93,920,859.03
  5. Step 5: Solve for x
    x = 93,920,859.03/9,999.76
  6. Step 6: Final answer
    x = 9,392.31

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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.