Home / 21,700.40-32,572.20-10,619.60

Finding the Fourth Proportional to 21,700.40, 32,572.20 and 10,619.60

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Solution

The fourth proportional to 21,700.40, 32,572.20 and 10,619.60 is: 15,939.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,700.40 : 32,572.20 = 10,619.60 : x
  2. Step 2: Convert to fraction form
    21,700.40/32,572.20 = 10,619.60/x
  3. Step 3: Cross multiply
    21,700.40x = 32,572.20 × 10,619.60
  4. Step 4: Simplify right side
    21,700.40x = 345,903,735.12
  5. Step 5: Solve for x
    x = 345,903,735.12/21,700.40
  6. Step 6: Final answer
    x = 15,939.97

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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.