Home / 21,975.12-32,965.92-6,390.72

Finding the Fourth Proportional to 21,975.12, 32,965.92 and 6,390.72

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Solution

The fourth proportional to 21,975.12, 32,965.92 and 6,390.72 is: 9,587.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,975.12 : 32,965.92 = 6,390.72 : x
  2. Step 2: Convert to fraction form
    21,975.12/32,965.92 = 6,390.72/x
  3. Step 3: Cross multiply
    21,975.12x = 32,965.92 × 6,390.72
  4. Step 4: Simplify right side
    21,975.12x = 210,675,964.26
  5. Step 5: Solve for x
    x = 210,675,964.26/21,975.12
  6. Step 6: Final answer
    x = 9,587.02

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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.