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Finding the Fourth Proportional to 10,957.20, 16,435.80 and 9,790.80

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Solution

The fourth proportional to 10,957.20, 16,435.80 and 9,790.80 is: 14,686.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,957.20 : 16,435.80 = 9,790.80 : x
  2. Step 2: Convert to fraction form
    10,957.20/16,435.80 = 9,790.80/x
  3. Step 3: Cross multiply
    10,957.20x = 16,435.80 × 9,790.80
  4. Step 4: Simplify right side
    10,957.20x = 160,919,630.64
  5. Step 5: Solve for x
    x = 160,919,630.64/10,957.20
  6. Step 6: Final answer
    x = 14,686.20

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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.