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Finding the Fourth Proportional to 9,817.20, 14,725.80 and 3,970.80

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Solution

The fourth proportional to 9,817.20, 14,725.80 and 3,970.80 is: 5,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,817.20 : 14,725.80 = 3,970.80 : x
  2. Step 2: Convert to fraction form
    9,817.20/14,725.80 = 3,970.80/x
  3. Step 3: Cross multiply
    9,817.20x = 14,725.80 × 3,970.80
  4. Step 4: Simplify right side
    9,817.20x = 58,473,206.64
  5. Step 5: Solve for x
    x = 58,473,206.64/9,817.20
  6. Step 6: Final answer
    x = 5,956.20

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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.