Home / 20,688.30-31,032.45-20,469.60

Finding the Fourth Proportional to 20,688.30, 31,032.45 and 20,469.60

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Solution

The fourth proportional to 20,688.30, 31,032.45 and 20,469.60 is: 30,704.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.30 : 31,032.45 = 20,469.60 : x
  2. Step 2: Convert to fraction form
    20,688.30/31,032.45 = 20,469.60/x
  3. Step 3: Cross multiply
    20,688.30x = 31,032.45 × 20,469.60
  4. Step 4: Simplify right side
    20,688.30x = 635,221,838.52
  5. Step 5: Solve for x
    x = 635,221,838.52/20,688.30
  6. Step 6: Final answer
    x = 30,704.40

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1.5x scale

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.