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Finding the Fourth Proportional to 9,816.80, 14,725.20 and 8,741.60

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Solution

The fourth proportional to 9,816.80, 14,725.20 and 8,741.60 is: 13,112.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,816.80 : 14,725.20 = 8,741.60 : x
  2. Step 2: Convert to fraction form
    9,816.80/14,725.20 = 8,741.60/x
  3. Step 3: Cross multiply
    9,816.80x = 14,725.20 × 8,741.60
  4. Step 4: Simplify right side
    9,816.80x = 128,721,808.32
  5. Step 5: Solve for x
    x = 128,721,808.32/9,816.80
  6. Step 6: Final answer
    x = 13,112.40

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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.