Home / 20,769.98-31,153.95-7,621.33

Finding the Fourth Proportional to 20,769.98, 31,153.95 and 7,621.33

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Solution

The fourth proportional to 20,769.98, 31,153.95 and 7,621.33 is: 11,431.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.98 : 31,153.95 = 7,621.33 : x
  2. Step 2: Convert to fraction form
    20,769.98/31,153.95 = 7,621.33/x
  3. Step 3: Cross multiply
    20,769.98x = 31,153.95 × 7,621.33
  4. Step 4: Simplify right side
    20,769.98x = 237,434,533.75
  5. Step 5: Solve for x
    x = 237,434,533.75/20,769.98
  6. Step 6: Final answer
    x = 11,431.62

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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.