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Finding the Fourth Proportional to 10,808.80, 16,232.40 and 7,890.40

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Solution

The fourth proportional to 10,808.80, 16,232.40 and 7,890.40 is: 11,849.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,808.80 : 16,232.40 = 7,890.40 : x
  2. Step 2: Convert to fraction form
    10,808.80/16,232.40 = 7,890.40/x
  3. Step 3: Cross multiply
    10,808.80x = 16,232.40 × 7,890.40
  4. Step 4: Simplify right side
    10,808.80x = 128,080,128.96
  5. Step 5: Solve for x
    x = 128,080,128.96/10,808.80
  6. Step 6: Final answer
    x = 11,849.62

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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.