Home / 20,377.10-30,520.50-15,662.40

Finding the Fourth Proportional to 20,377.10, 30,520.50 and 15,662.40

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Solution

The fourth proportional to 20,377.10, 30,520.50 and 15,662.40 is: 23,458.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.10 : 30,520.50 = 15,662.40 : x
  2. Step 2: Convert to fraction form
    20,377.10/30,520.50 = 15,662.40/x
  3. Step 3: Cross multiply
    20,377.10x = 30,520.50 × 15,662.40
  4. Step 4: Simplify right side
    20,377.10x = 478,024,106.01
  5. Step 5: Solve for x
    x = 478,024,106.01/20,377.10
  6. Step 6: Final answer
    x = 23,458.89

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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.