Home / 20,946.20-31,419.32-13,160.48

Finding the Fourth Proportional to 20,946.20, 31,419.32 and 13,160.48

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Solution

The fourth proportional to 20,946.20, 31,419.32 and 13,160.48 is: 19,740.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,946.20 : 31,419.32 = 13,160.48 : x
  2. Step 2: Convert to fraction form
    20,946.20/31,419.32 = 13,160.48/x
  3. Step 3: Cross multiply
    20,946.20x = 31,419.32 × 13,160.48
  4. Step 4: Simplify right side
    20,946.20x = 413,493,332.47
  5. Step 5: Solve for x
    x = 413,493,332.47/20,946.20
  6. Step 6: Final answer
    x = 19,740.73

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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.