Home / 21,359.20-32,000.40-18,901.60

Finding the Fourth Proportional to 21,359.20, 32,000.40 and 18,901.60

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Solution

The fourth proportional to 21,359.20, 32,000.40 and 18,901.60 is: 28,318.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,359.20 : 32,000.40 = 18,901.60 : x
  2. Step 2: Convert to fraction form
    21,359.20/32,000.40 = 18,901.60/x
  3. Step 3: Cross multiply
    21,359.20x = 32,000.40 × 18,901.60
  4. Step 4: Simplify right side
    21,359.20x = 604,858,760.64
  5. Step 5: Solve for x
    x = 604,858,760.64/21,359.20
  6. Step 6: Final answer
    x = 28,318.42

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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.