Home / 20,806.47-31,212.41-10,946.21

Finding the Fourth Proportional to 20,806.47, 31,212.41 and 10,946.21

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Solution

The fourth proportional to 20,806.47, 31,212.41 and 10,946.21 is: 16,420.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,806.47 : 31,212.41 = 10,946.21 : x
  2. Step 2: Convert to fraction form
    20,806.47/31,212.41 = 10,946.21/x
  3. Step 3: Cross multiply
    20,806.47x = 31,212.41 × 10,946.21
  4. Step 4: Simplify right side
    20,806.47x = 341,657,383.67
  5. Step 5: Solve for x
    x = 341,657,383.67/20,806.47
  6. Step 6: Final answer
    x = 16,420.73

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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.