Home / 20,871.32-31,293.09-10,851.45

Finding the Fourth Proportional to 20,871.32, 31,293.09 and 10,851.45

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Solution

The fourth proportional to 20,871.32, 31,293.09 and 10,851.45 is: 16,269.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.32 : 31,293.09 = 10,851.45 : x
  2. Step 2: Convert to fraction form
    20,871.32/31,293.09 = 10,851.45/x
  3. Step 3: Cross multiply
    20,871.32x = 31,293.09 × 10,851.45
  4. Step 4: Simplify right side
    20,871.32x = 339,575,401.48
  5. Step 5: Solve for x
    x = 339,575,401.48/20,871.32
  6. Step 6: Final answer
    x = 16,269.96

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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.