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Finding the Fourth Proportional to 21,957.60, 32,928.30 and 10,860.60

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Solution

The fourth proportional to 21,957.60, 32,928.30 and 10,860.60 is: 16,286.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,957.60 : 32,928.30 = 10,860.60 : x
  2. Step 2: Convert to fraction form
    21,957.60/32,928.30 = 10,860.60/x
  3. Step 3: Cross multiply
    21,957.60x = 32,928.30 × 10,860.60
  4. Step 4: Simplify right side
    21,957.60x = 357,621,094.98
  5. Step 5: Solve for x
    x = 357,621,094.98/21,957.60
  6. Step 6: Final answer
    x = 16,286.89

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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.