Home / 20,102.10-30,149.55-12,693.30

Finding the Fourth Proportional to 20,102.10, 30,149.55 and 12,693.30

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Solution

The fourth proportional to 20,102.10, 30,149.55 and 12,693.30 is: 19,037.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.10 : 30,149.55 = 12,693.30 : x
  2. Step 2: Convert to fraction form
    20,102.10/30,149.55 = 12,693.30/x
  3. Step 3: Cross multiply
    20,102.10x = 30,149.55 × 12,693.30
  4. Step 4: Simplify right side
    20,102.10x = 382,697,283.02
  5. Step 5: Solve for x
    x = 382,697,283.02/20,102.10
  6. Step 6: Final answer
    x = 19,037.68

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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.