Home / 20,216.70-30,292.65-12,807.90

Finding the Fourth Proportional to 20,216.70, 30,292.65 and 12,807.90

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Solution

The fourth proportional to 20,216.70, 30,292.65 and 12,807.90 is: 19,191.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,216.70 : 30,292.65 = 12,807.90 : x
  2. Step 2: Convert to fraction form
    20,216.70/30,292.65 = 12,807.90/x
  3. Step 3: Cross multiply
    20,216.70x = 30,292.65 × 12,807.90
  4. Step 4: Simplify right side
    20,216.70x = 387,985,231.94
  5. Step 5: Solve for x
    x = 387,985,231.94/20,216.70
  6. Step 6: Final answer
    x = 19,191.32

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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.