Home / 20,756.85-28,610.31-14,709.12

Finding the Fourth Proportional to 20,756.85, 28,610.31 and 14,709.12

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Solution

The fourth proportional to 20,756.85, 28,610.31 and 14,709.12 is: 20,274.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.85 : 28,610.31 = 14,709.12 : x
  2. Step 2: Convert to fraction form
    20,756.85/28,610.31 = 14,709.12/x
  3. Step 3: Cross multiply
    20,756.85x = 28,610.31 × 14,709.12
  4. Step 4: Simplify right side
    20,756.85x = 420,832,483.03
  5. Step 5: Solve for x
    x = 420,832,483.03/20,756.85
  6. Step 6: Final answer
    x = 20,274.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.