Home / 20,909.27-31,340.22-10,386.63

Finding the Fourth Proportional to 20,909.27, 31,340.22 and 10,386.63

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Solution

The fourth proportional to 20,909.27, 31,340.22 and 10,386.63 is: 15,568.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,909.27 : 31,340.22 = 10,386.63 : x
  2. Step 2: Convert to fraction form
    20,909.27/31,340.22 = 10,386.63/x
  3. Step 3: Cross multiply
    20,909.27x = 31,340.22 × 10,386.63
  4. Step 4: Simplify right side
    20,909.27x = 325,519,230.31
  5. Step 5: Solve for x
    x = 325,519,230.31/20,909.27
  6. Step 6: Final answer
    x = 15,568.18

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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.