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Finding the Fourth Proportional to 9,990.98, 13,784.26 and 6,456.27

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Solution

The fourth proportional to 9,990.98, 13,784.26 and 6,456.27 is: 8,907.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,990.98 : 13,784.26 = 6,456.27 : x
  2. Step 2: Convert to fraction form
    9,990.98/13,784.26 = 6,456.27/x
  3. Step 3: Cross multiply
    9,990.98x = 13,784.26 × 6,456.27
  4. Step 4: Simplify right side
    9,990.98x = 88,994,904.31
  5. Step 5: Solve for x
    x = 88,994,904.31/9,990.98
  6. Step 6: Final answer
    x = 8,907.53

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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.