Home / 21,619.81-32,432.37-7,390.64

Finding the Fourth Proportional to 21,619.81, 32,432.37 and 7,390.64

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Solution

The fourth proportional to 21,619.81, 32,432.37 and 7,390.64 is: 11,086.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.81 : 32,432.37 = 7,390.64 : x
  2. Step 2: Convert to fraction form
    21,619.81/32,432.37 = 7,390.64/x
  3. Step 3: Cross multiply
    21,619.81x = 32,432.37 × 7,390.64
  4. Step 4: Simplify right side
    21,619.81x = 239,695,971.02
  5. Step 5: Solve for x
    x = 239,695,971.02/21,619.81
  6. Step 6: Final answer
    x = 11,086.87

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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.