Home / 20,429.13-30,628.10-9,328.11

Finding the Fourth Proportional to 20,429.13, 30,628.10 and 9,328.11

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Solution

The fourth proportional to 20,429.13, 30,628.10 and 9,328.11 is: 13,985.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.13 : 30,628.10 = 9,328.11 : x
  2. Step 2: Convert to fraction form
    20,429.13/30,628.10 = 9,328.11/x
  3. Step 3: Cross multiply
    20,429.13x = 30,628.10 × 9,328.11
  4. Step 4: Simplify right side
    20,429.13x = 285,702,239.25
  5. Step 5: Solve for x
    x = 285,702,239.25/20,429.13
  6. Step 6: Final answer
    x = 13,985.04

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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.