Home / 21,185.73-31,756.41-7,140.92

Finding the Fourth Proportional to 21,185.73, 31,756.41 and 7,140.92

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Solution

The fourth proportional to 21,185.73, 31,756.41 and 7,140.92 is: 10,703.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,185.73 : 31,756.41 = 7,140.92 : x
  2. Step 2: Convert to fraction form
    21,185.73/31,756.41 = 7,140.92/x
  3. Step 3: Cross multiply
    21,185.73x = 31,756.41 × 7,140.92
  4. Step 4: Simplify right side
    21,185.73x = 226,769,824.52
  5. Step 5: Solve for x
    x = 226,769,824.52/21,185.73
  6. Step 6: Final answer
    x = 10,703.89

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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.