Home / 20,464.60-30,761.70-18,909.40

Finding the Fourth Proportional to 20,464.60, 30,761.70 and 18,909.40

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Solution

The fourth proportional to 20,464.60, 30,761.70 and 18,909.40 is: 28,423.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,464.60 : 30,761.70 = 18,909.40 : x
  2. Step 2: Convert to fraction form
    20,464.60/30,761.70 = 18,909.40/x
  3. Step 3: Cross multiply
    20,464.60x = 30,761.70 × 18,909.40
  4. Step 4: Simplify right side
    20,464.60x = 581,685,289.98
  5. Step 5: Solve for x
    x = 581,685,289.98/20,464.60
  6. Step 6: Final answer
    x = 28,423.98

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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.