Home / 20,345.29-30,463.26-12,909.49

Finding the Fourth Proportional to 20,345.29, 30,463.26 and 12,909.49

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Solution

The fourth proportional to 20,345.29, 30,463.26 and 12,909.49 is: 19,329.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.29 : 30,463.26 = 12,909.49 : x
  2. Step 2: Convert to fraction form
    20,345.29/30,463.26 = 12,909.49/x
  3. Step 3: Cross multiply
    20,345.29x = 30,463.26 × 12,909.49
  4. Step 4: Simplify right side
    20,345.29x = 393,265,025.77
  5. Step 5: Solve for x
    x = 393,265,025.77/20,345.29
  6. Step 6: Final answer
    x = 19,329.54

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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.