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Finding the Fourth Proportional to 21,968.96, 32,955.86 and 6,387.80

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Solution

The fourth proportional to 21,968.96, 32,955.86 and 6,387.80 is: 9,582.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,968.96 : 32,955.86 = 6,387.80 : x
  2. Step 2: Convert to fraction form
    21,968.96/32,955.86 = 6,387.80/x
  3. Step 3: Cross multiply
    21,968.96x = 32,955.86 × 6,387.80
  4. Step 4: Simplify right side
    21,968.96x = 210,515,293.70
  5. Step 5: Solve for x
    x = 210,515,293.70/21,968.96
  6. Step 6: Final answer
    x = 9,582.40

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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.