Home / 20,516.15-28,360.11-18,299.99

Finding the Fourth Proportional to 20,516.15, 28,360.11 and 18,299.99

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Solution

The fourth proportional to 20,516.15, 28,360.11 and 18,299.99 is: 25,296.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.15 : 28,360.11 = 18,299.99 : x
  2. Step 2: Convert to fraction form
    20,516.15/28,360.11 = 18,299.99/x
  3. Step 3: Cross multiply
    20,516.15x = 28,360.11 × 18,299.99
  4. Step 4: Simplify right side
    20,516.15x = 518,989,587.60
  5. Step 5: Solve for x
    x = 518,989,587.60/20,516.15
  6. Step 6: Final answer
    x = 25,296.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.