Home / 21,429.40-32,158.50-9,743.80

Finding the Fourth Proportional to 21,429.40, 32,158.50 and 9,743.80

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Solution

The fourth proportional to 21,429.40, 32,158.50 and 9,743.80 is: 14,622.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.40 : 32,158.50 = 9,743.80 : x
  2. Step 2: Convert to fraction form
    21,429.40/32,158.50 = 9,743.80/x
  3. Step 3: Cross multiply
    21,429.40x = 32,158.50 × 9,743.80
  4. Step 4: Simplify right side
    21,429.40x = 313,345,992.30
  5. Step 5: Solve for x
    x = 313,345,992.30/21,429.40
  6. Step 6: Final answer
    x = 14,622.25

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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.