Home / 20,520.27-30,783.24-9,426.78

Finding the Fourth Proportional to 20,520.27, 30,783.24 and 9,426.78

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Solution

The fourth proportional to 20,520.27, 30,783.24 and 9,426.78 is: 14,141.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.27 : 30,783.24 = 9,426.78 : x
  2. Step 2: Convert to fraction form
    20,520.27/30,783.24 = 9,426.78/x
  3. Step 3: Cross multiply
    20,520.27x = 30,783.24 × 9,426.78
  4. Step 4: Simplify right side
    20,520.27x = 290,186,831.17
  5. Step 5: Solve for x
    x = 290,186,831.17/20,520.27
  6. Step 6: Final answer
    x = 14,141.47

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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.