Home / 20,485.08-30,688.20-12,564.48

Finding the Fourth Proportional to 20,485.08, 30,688.20 and 12,564.48

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Solution

The fourth proportional to 20,485.08, 30,688.20 and 12,564.48 is: 18,822.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.08 : 30,688.20 = 12,564.48 : x
  2. Step 2: Convert to fraction form
    20,485.08/30,688.20 = 12,564.48/x
  3. Step 3: Cross multiply
    20,485.08x = 30,688.20 × 12,564.48
  4. Step 4: Simplify right side
    20,485.08x = 385,581,275.14
  5. Step 5: Solve for x
    x = 385,581,275.14/20,485.08
  6. Step 6: Final answer
    x = 18,822.54

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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.