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Finding the Fourth Proportional to 10,980.30, 16,470.45 and 8,355.90

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Solution

The fourth proportional to 10,980.30, 16,470.45 and 8,355.90 is: 12,533.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,980.30 : 16,470.45 = 8,355.90 : x
  2. Step 2: Convert to fraction form
    10,980.30/16,470.45 = 8,355.90/x
  3. Step 3: Cross multiply
    10,980.30x = 16,470.45 × 8,355.90
  4. Step 4: Simplify right side
    10,980.30x = 137,625,433.16
  5. Step 5: Solve for x
    x = 137,625,433.16/10,980.30
  6. Step 6: Final answer
    x = 12,533.85

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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.