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Finding the Fourth Proportional to 9,980.48, 14,930.40 and 8,340.32

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Solution

The fourth proportional to 9,980.48, 14,930.40 and 8,340.32 is: 12,476.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980.48 : 14,930.40 = 8,340.32 : x
  2. Step 2: Convert to fraction form
    9,980.48/14,930.40 = 8,340.32/x
  3. Step 3: Cross multiply
    9,980.48x = 14,930.40 × 8,340.32
  4. Step 4: Simplify right side
    9,980.48x = 124,524,313.73
  5. Step 5: Solve for x
    x = 124,524,313.73/9,980.48
  6. Step 6: Final answer
    x = 12,476.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.