Home / 20,688.23-31,029.38-6,646.45

Finding the Fourth Proportional to 20,688.23, 31,029.38 and 6,646.45

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Solution

The fourth proportional to 20,688.23, 31,029.38 and 6,646.45 is: 9,968.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,688.23 : 31,029.38 = 6,646.45 : x
  2. Step 2: Convert to fraction form
    20,688.23/31,029.38 = 6,646.45/x
  3. Step 3: Cross multiply
    20,688.23x = 31,029.38 × 6,646.45
  4. Step 4: Simplify right side
    20,688.23x = 206,235,107.73
  5. Step 5: Solve for x
    x = 206,235,107.73/20,688.23
  6. Step 6: Final answer
    x = 9,968.72

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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.