Home / 20,140.65-30,216.20-7,660.89

Finding the Fourth Proportional to 20,140.65, 30,216.20 and 7,660.89

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Solution

The fourth proportional to 20,140.65, 30,216.20 and 7,660.89 is: 11,493.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.65 : 30,216.20 = 7,660.89 : x
  2. Step 2: Convert to fraction form
    20,140.65/30,216.20 = 7,660.89/x
  3. Step 3: Cross multiply
    20,140.65x = 30,216.20 × 7,660.89
  4. Step 4: Simplify right side
    20,140.65x = 231,482,946.11
  5. Step 5: Solve for x
    x = 231,482,946.11/20,140.65
  6. Step 6: Final answer
    x = 11,493.32

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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.